JP6554359B2 - Water absorption treatment material and method for producing the same - Google Patents

Description

  The present invention relates to a water absorbing material that absorbs a liquid and a method of manufacturing the same.

  Patent Document 1 describes an excrement treatment material which is a kind of water absorption treatment material. The excrement treating material is provided with a core portion formed into a granular shape and a covering portion covering the core portion. The covering portion has a function of adhering the excrement treating materials which have absorbed the excrement at the time of use. Thereby, after use, the lump which consists of a plurality of excrement disposal materials is formed.

Unexamined-Japanese-Patent No. 2006-333773

  By forming a lump in this way, it becomes easy to distinguish and remove used ones from a large number of water-absorbing treatment materials in which unused ones and used ones are mixed. However, in the conventional water absorption treatment material, there has been a problem that peeling and breakage of the coated portion occur before use. Such peeling or the like leads to the deterioration of the water absorption treated material.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a water-absorbing treatment material that does not easily cause peeling or chipping of a covering portion and a method for manufacturing the same.

  The water absorption treatment material according to the present invention is a water absorption treatment material that absorbs a liquid, and is provided so as to wrap a granular core portion having water absorbency, a coating portion covering the core portion, the core portion and the coating portion. The coating portion is characterized in that the coating portion is configured to be broken when the water absorption treatment material absorbs the liquid.

  In this water absorption treatment material, a coated portion is provided so as to wrap the core portion and the covering portion. As a result, since the covering portion is not exposed to the outside of the water absorption treated material, it is possible to prevent peeling and breakage of the covering portion before use.

  Further, the method of manufacturing a water absorption treated material according to the present invention is a method of manufacturing a water absorption treated material that absorbs a liquid, comprising a core forming step of forming a granular core having water absorbing property, and covering the core As described above, the method includes the steps of: forming a covering portion forming the covering portion; and forming a covering portion forming the covering portion so as to wrap the core portion and the covering portion, wherein It is characterized in that it is formed to break when it absorbs liquid.

  In this manufacturing method, the coated portion is formed so as to wrap the core portion and the covering portion. Thereby, in the water absorption processing material after manufacture, since a coating | coated part is no longer exposed to the exterior of the said water absorption processing material, it can make it hard to produce peeling and a defect | deletion of a coating | coated part before use.

  ADVANTAGE OF THE INVENTION According to this invention, the water absorption processing material which peeling and defect of a coating | coated part do not produce easily, and its manufacturing method are implement | achieved.

It is a schematic diagram which shows one Embodiment of the water absorption process material by this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the description of the drawings, the same reference numerals are assigned to the same elements, and duplicate descriptions are omitted.

  FIG. 1 is a schematic view showing an embodiment of a water-absorbing treatment material according to the present invention. The water absorption treatment material 1 is a water absorption treatment material that absorbs liquid, and includes a core portion 10, a covering portion 20, and a covering portion 30. The water absorption treatment material 1 is, for example, an excrement disposal material that absorbs human or animal excrement.

  The core 10 is formed in a granular form. Examples of the shape of the core part 10 include a sphere, an ellipsoid, and a cylinder. The core portion 10 has water absorbency, and has a function of absorbing and retaining water such as urine. The core part 10 contains a water absorbing material (first water absorbing material). As the first water-absorbing material, for example, papers, tea shells, plastics, or okara can be used. The first water-absorbing material is preferably the main material of the core part 10. Here, the main material of the core portion 10 refers to the material constituting the core portion 10 that has the largest weight ratio in the core portion 10.

  Papers refer to materials mainly composed of pulp. Examples of the 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 covering portion 20 is provided to cover the core portion 10. The covering portion 20 may cover the entire surface of the core 10 or may cover only a part of the surface of the core 10. The covering portion 20 has a function of adhering the water absorption treated materials 1 which absorbed the liquid at the time of use. Thereby, the lump which consists of a plurality of water-absorbing treatment materials 1 is formed after use.

  The covering portion 20 contains a water absorbing material (second water absorbing material) and an adhesive material (second adhesive material). As the second water-absorbing material, for example, papers, tea shells, plastics or okara can be used. The second water absorbing material may be the same as or different from the first water absorbing material. The second water-absorbing material is preferably the main material of the covering portion 20. The definition of the main material of the covering portion 20 is the same as the definition of the main material of the core portion 10 described above.

  As the second adhesive material, for example, a water-insoluble adhesive material can be used. Such adhesive materials include, for example, water absorbing polymers. The water-absorbing polymer preferably has an average particle size of 20 μm or less. Here, the average particle diameter means a minimum opening through which particles of 50% by weight or more can pass when a water-absorbing polymer that is an aggregate of a large number of particles is passed through a sieve. Therefore, an average particle diameter of 20 μm or less means that 50% by weight or more of particles can pass when the water-absorbing polymer is passed through a sieve having an opening of 20 μm.

  A coating portion 30 is provided so as to wrap the core portion 10 and the covering portion 20. The coated portion 30 is formed on the coated portion 20 and located on the outermost surface of the water absorption treated material 1. The film part 30 contains an adhesive material (first adhesive material). As the first adhesive material, for example, starch or dextrin can be used. The first adhesive material is preferably the main material of the coating portion 30. The definition of the main material of the coating 30 is the same as the definition of the main material of the core 10 described above. The film part 30 may consist only of the 1st adhesive material. The weight ratio of the first adhesive material to the coating portion 30 is larger than the weight ratio of the second adhesive material to the coating portion 20. The first adhesive material is preferably water soluble. In the present embodiment, the coating portion 30 is made of only a water-soluble material and does not contain a non-water-soluble material.

  The thickness of the coated portion 30 is preferably 20% or less of the thickness of the coated portion 20, and more preferably 10% or less. The thickness of the coating portion 30 is, for example, 0.1 mm or less. In the present embodiment, the coating part 30 is transparent (including translucent, the same applies hereinafter). Therefore, the covering portion 20 can be seen through the covering portion 30. The coating unit 30 is configured to break when the water absorption treatment material 1 absorbs a liquid. That is, the coating part 30 is configured to be broken when receiving a liquid.

  Then, an example of the manufacturing method of the water absorption processing material 1 is demonstrated as one embodiment of the manufacturing method of the water absorption processing material by this invention. This manufacturing method includes a core portion forming step, a covering portion forming step, and a coating portion forming step.

  The core forming step is a step of forming the core 10. In this step, the material constituting the core 10 (core material) is pulverized to a predetermined size by a pulverizer, and then charged into a mixer at a predetermined ratio and mixed. Then, after adding water as necessary, the core material is extruded and granulated by a granulator. Thereby, the core part 10 shape | molded by the granular form is obtained.

  The covering portion forming step is a step of forming the covering portion 20. In this step, the material (coating material) constituting the coating portion 20 is attached to the periphery of the core portion 10. Specifically, a powdery coating material is attached around the core 10. The coating material contains a second water-absorbing material and a second adhesive material. For the application of the coating material, for example, a coating device can be used. At this time, the coating material adheres to the periphery of the core portion 10 mainly by the moisture contained in the core portion 10. Thereby, the covering part 20 which covers the core part 10 is obtained.

  The coated portion forming step is a step of forming the coated portion 30. In this process, a material (coating material) constituting the coating unit 30 is attached around the coating unit 20. Specifically, a liquid coating material is attached around the coating portion 20. The coating material contains a first adhesive material. The first adhesive material is preferably the main material of the coating material. The coating material may consist only of the first adhesive material. The weight ratio of the first adhesive material to the coating material is greater than the weight ratio of the second adhesive material to the coating material. For example, liquid starch or liquid dextrin may be used as the coating material. The deposition of the coating material can be performed by spraying the coating material around the coating portion 20 using, for example, a spray device or the like. At this time, the coating material adheres to the periphery of the coating portion 20 mainly by the adhesive force of the coating material itself. By drying the coating material attached to the periphery of the coating portion 20 in this manner, a coating (oblate) is formed on the coating portion 20. Thereby, the coating | coated part 30 which wraps the core part 10 and the coating | coated part 20 is obtained.

  In addition, it is preferable that it is 20% or less of the thickness of the coating part 20 formed in a coating | coated part formation process, and, as for the thickness of the coating part 30 formed in a coating part formation process, it is more preferable that it is 10% or less. In the present embodiment, a transparent film portion 30 is formed. The coated portion 30 is formed so as to be broken when the water absorption treated material 1 after manufacturing absorbs the liquid.

  Thereafter, the granules obtained in this manner are sieved to extract only the granules satisfying the predetermined specification (classification step). And the extracted granule is dried with a dryer (drying process). The moisture content of the core 10 is appropriately adjusted by this drying. Water absorption processing material 1 is obtained by the above.

  The effects of this embodiment will be described. In the present embodiment, the covering 30 is formed so as to wrap the core 10 and the covering 20. Thereby, in the water absorption treatment material 1, since the coating | coated part 20 is no longer exposed to the exterior of the said water absorption treatment material 1, it can make it difficult to produce peeling and a defect | deletion of the coating | coated part 20 before use.

  By the way, such a particulate water absorption treatment material is usually shipped in a state where a plurality of particles are accommodated together in one packaging bag. Therefore, in the conventional water absorption treated material, peeling and / or loss of the coating layer often occurs when each water absorption treated material rubs against another water absorption treated material and a packaging bag during transportation and the like. Thus, when peeling of a coating layer etc. occur in a packaging bag, it will become a cause when dust opens when opening a packaging bag and using a water absorption processing material. In this regard, according to the present embodiment, generation of such dust can also be suppressed.

  Furthermore, in the present embodiment, the coated portion 30 is configured to be broken when the water absorption treated material 1 absorbs the liquid. Thereby, it can be avoided that the absorption of the liquid by the water absorption treated material 1 is hindered by the film portion 30.

  The coating material contains a first adhesive material. Thereby, a film (coating part 30) can be easily formed on the covering part 20. When the first adhesive material is the main material of the coating material, the formation of such a coating is particularly easy. In addition, when the first adhesive material is water-soluble, the coated portion 30 can be easily broken when the water absorption treated material 1 absorbs a liquid.

  The weight ratio of the first adhesive material in the coating portion 30 (coating material) is larger than the weight ratio of the second adhesive material in the coating portion 20 (covering material). As described above, increasing the proportion by weight of the first adhesive material in the coating portion 30 is advantageous for easily forming a coating on the covering portion 20. On the other hand, if the weight ratio of the second adhesive material to the covering portion 20 is too large, the absorption of the liquid by the water absorption treated material 1 will be inhibited. This is because the flow of liquid which is about to reach the core 10 through the covering 20 is blocked by the second adhesive material. Therefore, reducing the weight ratio of the second adhesive material to the covering portion 20 is advantageous in enhancing the liquid absorption performance by the water absorption treated material 1.

  By reducing the thickness of the coated portion 30, the coated portion 30 can be easily broken when the water absorption treated material 1 absorbs a liquid. From this point of view, the thickness of the coated portion 30 is preferably 20% or less of the thickness of the coated portion 20, and more preferably 10% or less.

  The coated part 30 is transparent. Thereby, since the coating | coated part 20 can be visually recognized through the coating | coated part 30, the aesthetics of the water absorption processing material 1 can be raised, utilizing the color which the coating | coated part 20 has.

  The coating portion 30 is formed by depositing a liquid coating material around the coating portion 20. According to this method, the thin coating part 30 can be formed easily. Because the coating material is in a liquid state, a relatively small amount of the coating material can be easily attached to the coating portion 20.

  The covering portion 20 is formed by adhering a powdery covering material around the core portion 10. According to such a method, the covering portion 20 having a certain thickness can be easily formed. It is because it is easy to make a comparatively large amount of covering materials adhere to core part 10 because covering material is powdery. However, when the powdery coating material is used as described above, generation of dust due to peeling of the coated portion is likely to occur. Therefore, in this case, the present embodiment which can suppress the generation of such dust is particularly useful.

  The present invention is not limited to the above embodiment, and various modifications can be made. In the said embodiment, the case where the film-forming part formation process was performed prior to the sizing process was illustrated. However, the coating film forming step may be performed after the sizing step. Specifically, the coating portion forming step may be performed between the sizing step and the drying step, or may be performed after the drying step.

1 water absorption treatment material 10 core portion 20 coating portion 30 coating portion

Claims (22)

A water absorption material that absorbs liquid,
Granular core having water absorbing property,
A covering portion covering the core portion;
And a coating portion provided to wrap the core portion and the covering portion,
The coating portion contains the first adhesive material and is configured to be broken when the water-absorbing treatment material absorbs the liquid .
The water absorption treatment material , wherein the covering portion contains a second adhesive material. In the water absorption treatment material according to claim 1 ,
The first adhesive material is a water absorbing material, which is a main material of the coated portion. In the water absorption treatment material according to claim 1 or 2 ,
The first adhesive material is a water-absorbent material that is water soluble. In the water absorption treatment material according to any one of claims 1 to 3 ,
The water absorbing treatment material, wherein the first adhesive material is starch or dextrin. In the water absorption processing material in any one of Claims 1 thru | or 4 ,
The second adhesive material is a water-absorbing treatment material that is water-insoluble. In the water absorption treatment material according to claim 5 ,
The second adhesive material is a water-absorbing treatment material that is a water-absorbing polymer. In the water absorption processing material in any one of Claims 1 thru | or 6 ,
A water absorption treatment material, wherein a weight ratio of the first adhesive material to the coating portion is larger than a weight ratio of the second adhesive material to the coating portion. In the water absorption treatment material according to any one of claims 1 to 7 ,
A water absorption treated material, wherein a thickness of the coated portion is 20% or less of a thickness of the coated portion. In the water absorption treatment material according to claim 8 ,
A water absorption treated material, wherein a thickness of the coated portion is 10% or less of a thickness of the coated portion. In the water absorption treatment material according to any one of claims 1 to 9 ,
The said coating part is a water absorption processing material which is transparent. A method for producing a water absorption material that absorbs liquid,
A core portion forming step for forming a granular core portion having water absorption;
A covering portion forming step of forming a covering portion so as to cover the core portion;
And a coating portion forming step of forming a coating portion so as to wrap the core portion and the coating portion,
The coating portion contains the first adhesive material and is formed so as to be broken when the water-absorbing treatment material absorbs the liquid .
The method for manufacturing a water absorption treated material, wherein the covering portion is formed to contain a second adhesive material . In the method of manufacturing a water absorption treatment material according to claim 11 ,
In the coating portion forming step, a method for producing a water-absorbing treatment material, wherein the coating portion is formed by attaching a liquid coating material containing the first adhesive material around the covering portion. In the method of manufacturing a water absorption treatment material according to claim 12 ,
The first adhesive material is a method of manufacturing a water absorption treatment material which is a main material of the coating material. In the method of manufacturing a water absorption treatment material according to claim 12 or 13 ,
The first adhesive material is a method for producing a water-absorbing treatment material that is water-soluble. In the manufacturing method of the water absorption processing material in any one of Claims 12 thru | or 14 ,
The method for producing a water-absorbent treatment material, wherein the first adhesive material is starch or dextrin. In the manufacturing method of the water absorption processing material in any one of Claims 12 thru | or 15 ,
In the covering portion forming step, a method of manufacturing a water absorption treated material, in which the covering portion is formed by adhering a powdery covering material containing the second adhesive material around the core portion. In the method of manufacturing a water absorption treatment material according to claim 16 ,
The method for producing a water-absorbing treatment material, wherein the second adhesive material is water-insoluble. In the method of manufacturing a water absorption treatment material according to claim 17 ,
The method for producing a water-absorbing treatment material, wherein the second adhesive material is a water-absorbing polymer. In the manufacturing method of the water absorption processing material in any one of Claims 16 thru | or 18 ,
The manufacturing method of the water absorption processing material whose weight ratio of the said 1st adhesive material to the said coating material is larger than the weight ratio of the said 2nd adhesive material to the said coating material. In the manufacturing method of the water absorption processing material in any one of Claims 11 thru | or 19 ,
In the film forming step, a method of manufacturing a water-absorbent treatment material, wherein the film is formed such that the thickness of the film is 20% or less of the thickness of the covering. In the method of manufacturing a water absorption treatment material according to claim 20 ,
In the coated film forming step, a method of manufacturing a water absorption treated material, wherein the coated film portion is formed such that the thickness of the coated film portion is 10% or less of the thickness of the coated portion. In the manufacturing method of the water absorption processing material in any one of Claims 11 thru | or 21 ,
In the film part formation process, the manufacturing method of the water absorption processing material which forms the transparent said film part.

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