JP5377344B2 - Water absorption treatment material and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid-absorbing material having a multiple-layered structure having a coating layer part uniformly dyed in a short time after being used and also being produced inexpensively and easily. <P>SOLUTION: The liquid-absorbing material has a granular core part and the coating layer part for coating the granular core part, the coating layer part includes a base material having a composition ratio of 99.0 to 99.93 wt.%, and a dyeing material having a composition ratio of 1.0 to 0.07 wt.%, the dyeing material contains a porous adsorbent having an adsorption ratio of not less than 25 wt.% and having fine pores, and a water soluble dyestuff adsorbed in the fine pores of the porous adsorbent, the water soluble dyestuff is added to be 0.010 to 0.017 pt.wt. based on 100 pts.wt. coating layer part, and also the coating layer part is configured to be dyed by bringing an external water content into contact with the water soluble dyestuff. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a granular water-absorbing treatment material (hereinafter simply referred to as “water-absorbing treatment material”) for absorbing liquid such as human or animal excrement and a method for producing the same.

  Recently, the recognition of water-absorbing treatment materials for treating excrement such as pet animals has progressed, but there is an increasing demand for price reduction. In order to meet such a demand, various materials have been used. However, various materials have unique colors (lightness, saturation, hue, the same applies hereinafter), and when water-absorbing treatment materials are simply produced using such materials, there are cases where problems arise in appearance. It was. In order to solve such a problem, for example, there is a technique for mixing a water-absorbing treatment material with a pre-colored inert fine powder such as an inorganic oxide in the water-absorption treatment material. (Patent Document 1).

Japanese Patent No. 3740440

However, compared with the case where this colorant is directly mixed in the water-absorbing treatment material, this technique is easy to be colored because powder such as fine inorganic oxide is mixed in the water-absorbing treatment material. In some cases, the coloration becomes non-uniform due to the presence of the odor.
In addition, a plurality of dyes having different hues may be used for dyeing so as to obtain a mixed color. However, since each dye is colored separately, it is difficult to dye it so as to obtain a desired mixed color. It was.

  The present invention has been made to solve the above-described problems. After use, the coating layer can be uniformly dyed in a short time, and can be manufactured inexpensively and easily. An object is to provide a water-absorbing treatment material having a multilayer structure and a method for producing the same.

  In order to solve the above-mentioned problems, the water-absorbing treatment material of the present invention is a water-absorbing treatment material having a granular core part and a coating layer part covering the granular core part. 0.0 to 99.93% by weight of a base material and 1.0 to 0.07% by weight of a dyeing material, and the dyeing material has an adsorption rate of 25% by weight or more. , A porous adsorbent having fine pores, and a water-soluble dye adsorbed in the fine pores of the porous adsorbent, the water-soluble dye in an amount of 0. The coating layer is added so as to be in the range of 010 parts by weight to 0.017 parts by weight, and the coating layer part is configured to be dyeable by contact between external moisture and the water-soluble dye. It is characterized by being.

  In the water-absorbing treatment material, the water-soluble dye may be a mixture of two or more kinds of water-soluble dyes having different types and hues.

  According to the present invention, the dyeing material contains a porous adsorbent having fine pores and a water-soluble dye. Since the water-soluble dye is adsorbed in the fine pores of the porous adsorbent, it is possible to block water that exudes from the granular core and the like and prevent the water-soluble dye from reacting with water.

  The method for producing a water-absorbing treatment material of the present invention includes a granular core part and a coating layer part that covers the granular core part, the coating layer part containing a water-soluble dye, In the method for producing a water-absorbing treatment material having a multilayer structure configured so that the coating layer portion can be dyed by contact with a water-soluble dye, the granulation step for producing the granular core portion, and Dissolving the water-soluble dye in a solvent, and adsorbing the dissolved water-soluble dye to a porous adsorbent having fine pores to prepare a dyeing material, a dyeing material preparation step, and a base material containing the dyeing material By adding, a coating material manufacturing process for manufacturing a coating material constituting the coating layer part and a coating process for coating the periphery of the granular core part with the coating material are included.

According to the present invention, the water-soluble dye is not directly added, but the water-soluble dye is once dissolved in a solvent and then adsorbed to the porous adsorbent having fine pores. In addition, it is possible to realize coloring that is excellent in beauty.
Moreover, it can be dye | stained so that it may become a desired color easily by dissolving the several pigment | dye from which a color and a kind differ in a solvent, making it adsorb | suck to a porous adsorbent, and adding it to a coating layer part.

  Further, in the present invention, the water-absorbing treatment material is composed of 80% to 87% by weight of the granular core part and 20% to 13% by weight of the coating layer part. In the granulation step, The moisture content of the granular core is 20% to 41% by weight, and in the dyeing material preparation step, the water-soluble dye is 0.010 to 0.017 with respect to 100 parts by weight of the coating layer. It is good also as a structure added so that it may become in the range.

According to the water-absorbing treatment material produced according to the present invention, the water-soluble dye is not directly added, but the water-soluble dye is once dissolved in a solvent and then adsorbed on the porous adsorbent. The porous adsorbent adsorbs water-soluble dyes in the gaps, so it blocks water that oozes from the granular core and prevents the color development before use by reacting the water-soluble dye with water. Can do.
In addition, since a water-soluble dye is mixed in the coating layer, the dye that develops color when it comes into contact with moisture from the outside quickly diffuses into the coating layer. can do.

  According to the present invention, the outer layer and the water-soluble dye come into contact only after use without coloring before use, so that the coating layer portion can be dyed and the water absorption treatment with a multilayer structure can be easily and inexpensively. It becomes possible to provide a material and a manufacturing method thereof.

It is process drawing which shows the manufacturing method of the water absorption processing material of this invention.

  About one form (henceforth "embodiment") for carrying out the present invention, a granular water-absorbing treatment material (excrement treatment material) for treating excrement for pets such as cats and dogs is taken as an example. This will be described in detail with reference to the drawings.

[Water absorption treatment material]
The water-absorbing treatment material of the present invention (hereinafter referred to as “the present water-absorbing treatment material”) includes a granular core portion for absorbing moisture from the outside, and a coating layer portion having a predetermined thickness that covers the surface of the granular core portion. And has a multilayer structure.

<Constituent material of granular core>
The granular core only needs to be formed in the shape of a small lump and does not need to be a perfect sphere or the like, and any shape such as a columnar body (elongated) or a flat shape may be used.
In addition, the material of the granular core is not limited as long as it has water absorption performance or water retention performance.
For example, plastic materials such as polypropylene, vinyl chloride, polychlorinated biphenyl, polystyrene, polyacetal, polycarbonate, polyethylene, polyamide, polyethylene terephthalate, vinylidene chloride, acrylic resin, polyurethane (urethane foam), and other biodegradable plastics are used. You can also

  In addition, plastic waste separation products for animal excrement disposal materials, plastic separation products for disposable diaper waste materials, plastic separation products for sanitary napkin waste materials, plastic separation products for animal paper diaper waste materials, sanitary products Napkin waste plastic rich separation, animal sanitary napkin waste plastic rich separation, milk pad waste plastic rich separation, sweat pad waste plastic rich separation, incontinence pad waste plastic rich separation Separation products rich in plastics of waste products from animal sheets, separation products from classification of plastics from waste sheets in bedding, separation products rich in plastics from mask waste materials, separation products rich in plastics from eye mask waste materials, head cover waste materials from seats Segregated products rich in plastic , Vinyl wallpaper scrap chloride, the separated products or synthetic resin fibers wastes rich plastic pillowcase scrap (collectively these materials may be referred to as "sanitary wastes, etc.".) Can also be used.

  In addition to the plastic material, other organic waste materials may be added. These organic waste materials include animal waste disposal materials, paper diaper waste, animal paper diaper waste (such as non-standard paper diaper exteriors produced by hygiene manufacturers), sanitary napkin waste, animal sanitary Napkin waste materials (external sanitary napkin exterior bodies from sanitary material manufacturers, etc.), milk pad waste materials, sweat pad waste materials, incontinence pad waste materials, animal sheet waste materials, bed sheet waste materials, mask waste materials, eye mask waste materials , Seat head cover waste, pillow cover waste, tissue paper waste, sanitary paper waste, toilet paper waste, tissue paper waste, decorative paper waste, dust paper waste, paper cotton waste, paper towel waste, toilet seat waste, newspaper waste, magazine waste, Buff powder (mainly fine paper powder generated at the time of bookbinding cutting and cutting in printing companies), mechanical pulp waste, chemical pulp Waste, titanium paper waste, semi-chemical pulp waste, cotton-like pulp waste, wood pulp waste, waste pulp waste, fluff pulp, water-absorbing fiber waste, non-woven fabric waste, non-woven fabric paper dust, generated in the papermaking process Paper dust generated during the manufacture of paper dust or sanitary material, laminated paper waste, laminated paper printing waste, laminated paper scraps, cardboard waste, waste paper (trimming loss generated from sanitary materials manufacturers, non-woven fabrics, etc., generated from paper manufacturers General paper waste), paper sludge, pulp sludge, wood waste, wood waste, wood flour, paper powder, roasted coffee bean extraction residue, tea husk, vegetable waste, used ticket or punch waste, or a mixture of two or more of these materials (Hereinafter, these materials may be collectively referred to as “organic waste materials”).

Further, inorganic waste materials, inorganic materials such as bentonite and zeolite, and the like can be used for the granular core.
It is also possible to add substances that can exhibit other effects without impairing water absorption performance, such as deodorizing materials, deodorizing materials, substances having bactericidal action, coloring substances, and test indicators. .

<Coating material>
The coating layer portion is mainly composed of a coating material to which a base material and a dyeing material are added.

◎ Coating material The coating layer portion is provided for the first purpose to have a function of adhering water-absorbing treatment materials wetted with excrement such as urine during use to form a lump. In addition, when the granular core portion has a unique color, the coating layer portion has a second object of covering the periphery of the granular core portion and hiding the color of the granular core portion before use. It is provided as.
The base material plays the role of these coating layer portions. Examples of the material include a water-absorbing resin, a water-soluble material having adhesiveness (hereinafter referred to as “water-soluble adhesive material”), or both materials. It is preferable to use a mixture of the above and a mixture of paper powder.

  The water-absorbing resin is a resin having water absorption performance such as a polymer, CMC (carboxyl methylcellulose), polyvinyl alcohol (PVA), starch (T-α-modified starch, dextrin, wheat starch, potato starch). In particular, the polymer is a highly water-absorbing resin having high water absorption performance.

  Examples of the water-soluble adhesive material include a superabsorbent resin such as glue and sodium polyacrylate. Examples of the paste functioning as an adhesive include potato starch, wheat starch, sweet potato starch, corn starch, tapioca starch, rice starch, dextrin, starches such as starches converted to alpha (α), acrylamide, PVA, carboxy Methylcellulose or sodium alginate can be used, or two or more of these materials can be used in combination. Other adhesives include super absorbent resins, vinyl esters, bentonite, pullulan, casein or gelatin, which are used alone or in combination of two or more of these substances. To do.

  Paper powder includes thin paper, thin paper waste, sanitary paper, sanitary paper waste, toilet paper paper, toilet paper waste, tissue paper paper, tissue paper waste, decorative paper paper, cosmetic paper waste, dust paper paper, dust paper waste, paper cotton, Waste paper cotton, paper towel, paper towel waste, toilet seat waste, mechanical pulp, mechanical pulp waste, chemical pulp, chemical pulp waste, semi-chemical pulp, semi-chemical pulp waste, cotton-like pulp, cotton-like pulp waste, wood pulp, Waste wood pulp, ground pulp waste, fluff pulp, water absorbent fiber waste, paper powder containing water absorbent resin, paper powder generated during bookbinding, paper powder generated during non-woven fabric production, paper powder generated during the papermaking process, or hygiene Paper powder generated during material production or a mixture of two or more of these pulverized products, both 0.5 mm The following are preferably used ground to granules of the following particle size 0.3 mm and.

◎ Dyeing material Further, the coating layer portion is dyed after use, thereby facilitating the discrimination between the used portion and the unused portion, and also has the effect of hiding the color of the granular core portion after use. It is provided for the purpose.
In order to achieve this object, the water-absorbing treatment material uses a dyeing material in which a water-soluble dye dissolved in a solvent is adsorbed on a porous adsorbent.

  The purpose of using water-soluble dyes is to facilitate dyeing with moisture penetrating from the outside. Direct dyes, part of acidic dyes and basic dyes that are readily soluble in water, reactive dyes, etc. Known water-soluble natural dyes and water-soluble synthetic dyes that satisfy the requirements for solubility in water can be used. In addition, the water-soluble dye may be a mixture of a plurality of water-soluble dyes having different types and hues (such as a mixture of a plurality of pigments (colorants) having different types and hues). .

  As described in detail below, the water-absorbing treatment material is characterized by a method for adding a water-soluble dye. That is, the water-soluble dye is once dissolved in water as a solvent, adsorbed by a porous adsorbent pulverized into a fine powder, and then added to the coating layer portion.

The porous adsorbent needs to use an adsorbent containing many fine pores (fine voids), a large surface area, and an adsorption rate of 25% by weight or more, and silica gel (so-called A type silica gel and B type silica gel). ) (Silicon dioxide), known substances such as zeolite (aluminosilicate) can be used. In particular, the B type silica gel has an average adsorption surface area of about 450 (m ² / g), an average fine pore diameter of about 60 mm, and a fine pore volume of about 0.75 (ml / g)). Compared with a surface area of about 700 (m ² / g), an average fine pore diameter of about 24 mm, and a fine pore volume of about 0.46 (ml / g)), the dissolved water-soluble dye In the case of adsorbing, high adsorption performance is exhibited, which is very suitable.

By adding the above water-soluble dye, for example, the color of the granular core part and the coating layer part is different, and the coating layer part is colored to other colors (for example, the granular core part is yellow). The coating layer is colored blue and the whole is dyed green, the granular core is colored white and the coating is colored red and the whole is dyed pink), and the granular core and coating layer The part can be dyed in the same color.
Thus, an appropriate water-soluble dye can be used in consideration of the type of coating material, the color of the coating layer portion and the granular core portion, the color of the coating layer portion after use for which dyeing is desired, and the like.

  Further, a penetrating agent or a swelling agent can be added to the coating layer portion. As the penetrant, known substances such as various surfactants can be used, and as the swelling agent, known substances such as a cellulose-based swelling agent can be used.

Constituent Ratio of Coating Material A covering material has a base ratio of 99.0 wt% to 99.93 wt% (preferably 99.60 wt% to 99.85 wt%); The dyeing material is composed of 0 wt% to 0.07 wt% (preferably 0.40 wt% to 0.15 wt%).
The water-soluble dye in the dyeing material is added so as to be in the range of 0.010 to 0.017 (more preferably 0.013 to 0.015) with respect to 100 parts by weight of the coating layer. ing.
The dyeing material preferably has a blending ratio in the range of 6.5 to 11.0 parts by weight of the porous adsorbent with respect to 1 part by weight of the water-soluble dye.

<Composition ratio of granular core and coating layer>
The water-absorbing treatment material has a composition ratio of 80% to 87% by weight of the granular core part and 20% to 13% by weight of the coating layer part. It is optimal in relation to the addition ratio of the following water-soluble dyes.

[Production method]
Then, the manufacturing method of the water absorption processing material of this invention is demonstrated with reference to FIG.
The manufacturing method of the excrement disposal material according to the present invention includes a granulation step (S1), a dye material preparation step (S2), a coating material manufacturing step (S3), a coating step (S4), and a sizing step ( S5) and a drying step (S6).

(1) Granulation step (S1)
This step is a step of forming a granular core part.
In this process, constituent materials such as plastic materials and sanitary waste materials, such as organic waste materials, are pulverized to a predetermined size with a crusher, and the pulverized component materials are put into a mixer to a predetermined ratio and mixed. . And after adding water and raising a moisture content, the operation | work which forms a granular core part is performed by carrying out extrusion granulation of the base material.

Since the coating material adheres to the surroundings due to moisture present in the granular core part, if the lower limit of the moisture content of the granular core part before the coating layer part is formed, the coating layer part is formed around the granular core part. The material to be attached will not adhere. That is, when the moisture content of the granular core portion is less than 20% by weight, a coating layer portion having a predetermined thickness necessary for exhibiting a predetermined action is not formed, and a water-absorbing treatment material having a multilayer structure is not formed. Thus, the coating layer is not preferable because it peels off, does not become a lump after use, and is not excellent in aesthetic appearance.
On the other hand, when the moisture content of the granular core part exceeds 41% by weight, the water in the granular core part exudes excessively to the coating layer part during the formation of the coating layer part, so that it contacts the water-soluble dye and develops color. This is not preferable.
In consideration of such circumstances, in the case of the above-mentioned extrusion granulation, the water content can be adjusted to be 20 wt% to 41 wt% (more preferably 20 wt% to 25 wt%). preferable.

(2) Dyeing material preparation step (S2)
This step is a step of preparing a staining material, and further includes a dissolution step (S21) and an adsorption step (S22).

The dissolution step (S21) is a step of dissolving a water-soluble dye (one type or a mixture of a plurality of types) in a solvent.
In this step, a desired water-soluble dye is dissolved in water as a solvent so that water as a solvent is 1.5 to 5.7 parts by weight with respect to 1 part by weight of the water-soluble dye. . At this time, depending on the type of the water-soluble dye used, the water temperature is not necessarily limited as long as the dilution ratio can be achieved, but the water-soluble dye dissolves as the water temperature increases. Therefore, it is preferable to dissolve in hot water or hot water (solvent) at 60 ° C. to 100 ° C. (more preferably 85 ° C. to 95 ° C.).

In the adsorption step (S22), the dissolved water-soluble dye is dropped little by little into the porous adsorbent made into a fine powder and mixed to adsorb the water-soluble dye to the porous adsorbent to obtain a dyeing material. It is a process of blending.
The constituent ratio of the water-soluble dye and the porous adsorbent depends on the adsorption rate of the porous adsorbent and the dilution rate of the water-soluble dye. However, if the addition amount of the porous adsorbent is larger than the predetermined amount, the porous adsorbent particles are exposed from the surface layer of the coating layer portion, and the exposed portion protrudes in a protruding shape from the surface layer. . Further, when the water-absorbing treatment materials are brought into contact with each other at the time of bagging or transporting, the protruding portion is separated from the base end portion, and the surface layer portion is damaged.

In addition, the composition ratio of the base material of the coating layer portion to the dyeing material formed from the water-soluble dye and the porous adsorbent is 99.0 wt% to 99.97 wt% in the former and 1.0 wt. The water-soluble dye in the dyeing material is added so as to be in the range of 0.010 to 0.017 with respect to 100 parts by weight of the coating layer. It will be necessary.
Since the adsorption rate of the porous adsorbent is determined by the substance, the minimum amount of the porous adsorbent required to adsorb the water-soluble dye necessary for color development after use is theoretically determined. (Normally, about 6.5 to 11.0 parts by weight of the porous adsorbent with respect to 1 part by weight of the water-soluble dye).

(3) Coating material manufacturing process (S3)
This step is a step of manufacturing a coating material constituting the coating layer portion.
This step is a step of manufacturing a coating material by adding and mixing the dyeing material prepared in the dyeing material preparation step to a base material composed of a predetermined material.
In addition, when adding desired materials other than coating materials and dyeing materials, such as a penetrating agent and a swelling agent, to a coating layer part, it will carry out at this process.

(4) Covering step (S4)
This step is a step of forming the covering layer portion by covering the periphery of the granular core portion with the covering material. In this step, a coating material or the like is used to spray a coating material around the granular core portion to form a coating layer portion, thereby performing an operation of manufacturing a water absorption treatment material having a multilayer structure.

(5) Sizing process (S5)
This step is a step of sizing so that the water-absorbing treatment material has a predetermined standard.
In this step, the non-standard product is separated by passing the water-absorbing treatment material produced in the previous step through a sieve having a predetermined size, and only the predetermined standard product is extracted. Become.

(6) Drying step (S6)
This step is a step of drying the water-absorbing treatment material extracted as a standard product with a dryer.
If the water content of the granular core is high during storage of the water-absorbing treatment material, the water in the granular core exudes over a long period of time and reacts with the water-soluble dye to cause color development. Therefore, the water-absorbing treatment material is dried so that the moisture content of the granular core that can prevent color development during storage is within the range of 3% to 10%.

[Function and effect]
According to the water-absorbing treatment material produced according to the present invention, the water-soluble dye is not directly added, but the water-soluble dye is once dissolved in a solvent and then adsorbed on the porous adsorbent. The porous adsorbent adsorbs water-soluble dyes in the gaps, so it blocks water that oozes from the granular core and prevents the color development before use by reacting the water-soluble dye with water. Can do.

In addition, since the water-soluble dye is mixed in the coating layer, the dye that develops color when it comes into contact with moisture from the outside quickly diffuses into the coating layer. can do. In particular, since the coating layer portion contains a large amount of white paper powder and the like, it is often white. In that case, it can be dyed vividly and beautifully with a water-soluble dye.
Furthermore, a plurality of pigments of different colors and types can be dissolved in a solvent, adsorbed on a porous adsorbent, and added to the coating layer portion, so that it can be easily dyed to have a desired color. .

As mentioned above, although an example about a suitable embodiment was explained about the present invention, the present invention is not restricted to the embodiment concerned, and a design change is possible suitably in the range which does not deviate from the meaning of the present invention. In this embodiment, the method for producing a water-absorbing treatment material for treating excrement for pets has been described as an example, but the use of the water-absorbing treatment material may be used for humans, other animals, etc. Needless to say.
In the above description, the dyeing material preparation step is described after the granulation step. However, both steps may be performed in parallel in time.
Furthermore, in addition to the above steps, other steps can be added as appropriate.

  In order to investigate the performance of the water-absorbing treatment material, a sample was prepared by the following production method, and four kinds of color development tests were performed.

1. Color development test with different adsorbents

<Constituent materials>
Each sample used in the following test is a water absorption treatment material having a multilayer structure formed of a granular core part and a coating layer part, and the weight ratio of the materials constituting the granular core part and the coating layer part is 80%. 20% vs. 20%. Further, the following constituent materials constituting the granular core portion and the coating layer portion were common to all samples.

(1) Granular core The raw material was vinyl chloride wallpaper, paper diaper waste, sanitary napkin waste, and waste paper.

(2) Coating layer part The base material was produced by mixing 60% by weight of paper powder, 20% by weight of tapioca pregelatinized starch, 16% by weight of sodium polyacrylate (water absorbent resin) and 4% by weight of dextrin.
As the water-soluble dye, Edible Blue No. 1 (alias: Brilliant Blue FCF, manufactured by Daiwa Kasei Co., Ltd.) was used.
Each sample used B type silica gel, A type silica gel, zeolite, activated carbon, titanium oxide, and calcium carbonate fine powder as an adsorbent.

<Manufacturing method>
The sample is a water-absorbing treatment material produced using the production method of the present invention.
First, after the above constituent materials were mixed and watered to increase the water content to 20%, the base material was extruded and granulated to form a granular core (4000 g).
Next, the mixed water-soluble dye was dissolved in 60 ° C. hot water as a solvent so that the dilution ratio was 2.33 times (water 70 wt%, water-soluble dye 30 wt%). Then, the dissolved water-soluble dye was added dropwise to each of the above 6 types of adsorbents, which were fine powders, and adsorbed to the adsorbents to prepare dyeing materials.
Then, the dyeing | staining material (10g) was added to the base material (990g), and the coating material (1000g) was manufactured by mixing. Subsequently, a coating layer portion was formed by coating the periphery of the granular core portion with a coating material.

<Observation results>
First, for each of the above samples, the adsorption rate of the water-soluble dye was measured. As a result, B-type silica gel 49.5%, A-type silica gel 26.0%, zeolite 26.0%, activated carbon 5.5%, titanium oxide 5 0.5% and calcium carbonate 4.5%.
By the way, the blending amount of the water-soluble dye with respect to the total mass of the coating layer part is 0.014% B-type silica gel, 0.0070% A-type silica gel, 0.0070% zeolite, 0.0015% activated carbon, 0.0015 titanium oxide. %, And calcium carbonate 0.0012% (in this case, 10 g of the dyeing material, and the blending amount of the water-soluble dye is determined from the adsorption rate).

Regarding each of the above samples, the degree of coloration of the coating layer portion was visually observed before and after use. As a result, each sample exhibiting an adsorption rate of 25% or more uses a porous adsorbent (B-type silica gel, A-type silica gel, zeolite), and the color of the coating layer is not visually recognized before use. After use, the coating layer was colored blue and was clearly dyed.
On the other hand, in each sample (activated carbon, titanium oxide, calcium carbonate) exhibiting an adsorption rate of less than 25%, the coloring of the coating layer portion was not visually recognized before and after use, and good results were not obtained.

  According to this result, it is clear that a sample using a porous adsorbent having a high adsorption rate can retain a larger amount of water-soluble dye, and moreover, moisture that exudes from the granular core portion, etc. It was confirmed that color formation could be prevented before use by blocking and allowing the water-soluble dye to react with moisture.

2. Color development test using samples with different manufacturing methods <Constituent materials>
Each sample used in the following test is a water absorption treatment material having a multilayer structure formed of a granular core part and a coating layer part, and the weight ratio of the materials constituting the granular core part and the coating layer part is 80%. 20% vs. 20%. Further, the following constituent materials constituting the granular core portion and the coating layer portion were common to all samples.

(1) Granular core The raw material was vinyl chloride wallpaper, paper diaper waste, sanitary napkin waste, and waste paper.

(2) Coating layer part The base material was produced by mixing 60% by weight of paper powder, 20% by weight of tapioca pregelatinized starch, 16% by weight of sodium polyacrylate (water absorbent resin) and 4% by weight of dextrin.
The water-soluble dyes are 66.7% by weight of edible blue No. 1 (aka: Brilliant Blue FCF, manufactured by Daiwa Kasei Co., Ltd.) and 33.3% by weight of edible yellow No. 4 (also known as Tartrazine, manufactured by Daiwa Kasei). It mixed so that it might become a composition ratio.
In addition, fine powder of B-type silica gel was used as the porous adsorbent.

<Manufacturing method>
(1) 1st sample A 1st sample manufactures a water absorption processing material (5000g) using the manufacturing method of this invention.
First, after the above constituent materials were mixed and watered to increase the water content to 20%, the base material was extruded and granulated to form a granular core (4000 g).
Next, the mixed water-soluble dye was dissolved in 90 ° C. hot water as a solvent so that the dilution ratio was 5.67 times (water 85 wt%, water-soluble dye 15 wt%). 0.76 g, water-soluble dye 0.14 g [breakdown, food blue No. 1 (0.10 g), food yellow No. 4 (0.04 g)]). Then, the dyed material (2 g) was prepared by allowing the dissolved water-soluble dye to be adsorbed to the porous adsorbent by adding dropwise to the porous adsorbent (1.1 g) made into a fine powder in small amounts. . Then, the dyeing | staining material (2g) was added to the base material (998g), and the coating material (1000g) was manufactured by mixing.
Subsequently, a coating layer portion was formed by coating the periphery of the granular core portion with a coating material.

(2) 2nd sample A 2nd sample replaces only the coating material manufacturing process of the manufacturing method of this invention with the following processes, and manufactures a water absorption processing material.
That is, food blue 1 (0.10 g) and food yellow 4 (0.04 g), which are water-soluble dyes, are directly added to the base material (999.86 g) as a solid and mixed to form a coating. A material (1000 g) is formed.

<Observation results>
Regarding each of the above samples, the degree of coloration of the coating layer portion was visually observed before and after use. As a result, in the first sample produced using the production method of the present invention, the color of the coating layer portion was not visually recognized before use, and after use, the coating layer portion was edible blue No. 1 and edible yellow No. 4 It was a good result that it was clearly dyed so as to be green, which is a mixed color.
On the other hand, in the second sample produced by the conventional method different from the production method of the present invention, the food blue 1 and food yellow 4 pigments are colored separately, resulting in partial blue and yellow portions. As a result, good results could not be obtained.
From the above results, the usefulness of the present invention was confirmed.

3. Coloring test using samples with different blending ratios of the coating layer portion In this test, the same constituent materials as in “2. Coloring test using samples with different manufacturing methods” described above were used, and the substrate and A total of 108 sample groups having different composition ratios of dyeing materials (coating materials) were produced (the substrate was 98.91 wt% to 99.98 wt%, and the dye material was 1.09 wt% to 0.02 wt%). Each sample was manufactured by changing 0.01 parts by weight so that it was in the range of%).

<Observation results>
Regarding each of the above samples, the degree of coloration of the coating layer portion was visually observed before and after use. As a result, for each sample in which the coating material was 99.00 wt% to 99.93 wt% and the dyeing material was 1.00 wt% to 0.070 wt%, the coloring of the coating layer portion was visually recognized before use. However, after use, the coating layer was clearly dyed so as to be green, which is a mixed color of edible blue No. 1 and edible yellow No. 4 (particularly, the base material was 99 Each sample with .60 wt% to 99.85 wt% and dyeing material of 0.40 wt% to 0.15 wt% gave particularly good results.
On the other hand, for each sample in which the coating material was 99.94 wt% to 99.98 wt% and the dye material was 0.06 wt% to 0.02 wt%, clear dyeing was confirmed before and after use. No good results were obtained.
In addition, with respect to each sample in which the coating material was 98.91 wt% to 99.99 wt% and the dyeing material was 1.09 wt% to 1.01 wt%, food blue 1 and food yellow 4 were used before use. It was clearly dyed to be green, which is a mixed color of No., and good results were not obtained.

4). Color development test using samples with different amounts of water-soluble dyes In this test, the same constituent materials as in “2. Color development test using samples with different production methods” were used. The addition amount of the sexual dye is changed by 0.01 parts by weight within a range of 0.07 g to 0.20 g (however, the blending ratio is 2: 1 for the weight ratio of Food Blue 1 and Food Yellow 4). A sample group of a total of 14 patterns with different blending ratios manufactured by this method was used to confirm the color development.

<Observation results>
Regarding each of the above samples, the degree of coloration of the coating layer portion was visually observed before and after use. As a result, for each sample in which the amount of water-soluble dye added to 1000 g of the coating material was 0.10 to 0.17 g, the color of the coating layer was not visually recognized before use, and after use, the coating layer was Good result of clear dyeing to be green, which is a mixed color of edible blue No. 1 and edible yellow No. 4 (each sample with an addition amount of 0.13 g to 0.15 g was particularly good) ).
On the other hand, regarding each sample in which the amount of water-soluble dye added to 1000 g of the coating material was 0.07 g to 0.09 g, clear dyeing was not confirmed before and after use, and good results were not obtained. .
In addition, with respect to each sample in which the amount of water-soluble dye added to 1000 g of the coating material is 0.18 g to 0.20 g, before use, it becomes green, which is a mixed color of edible blue No. 1 and edible yellow No. 4 It was dyed clearly, and good results were not obtained.

S1 Granulation process S2 Dyeing material preparation process S3 Coating material manufacturing process S4 Coating process S5 Sizing process S6 Drying process

Claims (3)

In the water-absorbing treatment material having a granular core part and a coating layer part covering the granular core part,
The covering layer portion is composed of a base material having a composition ratio of 99.0% by weight to 99.93% by weight and a dyeing material of 1.0% by weight to 0.07% by weight,
The dyeing material has an adsorption rate of 25% by weight or more, and includes a porous adsorbent having fine pores, and a water-soluble dye adsorbed in the fine pores of the porous adsorbent,
The water-soluble dye is added so as to be in the range of 0.010 parts by weight to 0.017 parts by weight with respect to 100 parts by weight of the coating layer part,
The water-absorbing treatment material is characterized in that the coating layer portion is configured to be dyeable by contact between external moisture and the water-soluble dye.   The water-absorbing treatment material according to claim 1, wherein the water-soluble dye is a mixture of two or more kinds. Having a granular core and a coating layer covering the granular core;
The coating layer portion contains a water-soluble dye, and the water-absorbing treatment material is a multi-layered structure configured so that the coating layer portion can be dyed by contact with external water and the water-soluble dye. In the manufacturing method,
A granulating step for producing the granular core so that the water content is 20% by weight to 41% by weight ;
The water-soluble dye is dissolved in a solvent, and the dissolved water-soluble dye is microporous so as to be in the range of 0.010 to 0.017 parts by weight with respect to 100 parts by weight of the coating layer part. A dyeing material preparation step of preparing a dyeing material by adsorbing to a porous adsorbent having
A coating material production process for producing a coating material constituting the coating layer part by adding the dyeing material to a substrate;
Look including a coating step of coating the periphery of the granular core section with the coating material,
The method for producing a water-absorbing treatment material, characterized in that the water-absorbing treatment material has a composition ratio of 80 to 87 wt% for the granular core portion and 20 to 13 wt% for the coating layer portion .