Excrement treatment material and method for manufacturing the same
An excrement treatment material is constituted by a water-repellent grain. The grain exhibits a first color before being used, and exhibits a second color that is different from the first color when it is time to replace the grain.
1. An excrement treatment material constituted by a water-repellent grain, wherein:
the water-repellent grain exhibits a first color before being used, and exhibits a second color that is different from the first color when it is time to replace the water-repellent grain, and
the water-repellent grain before being used has a water repellency of 80% or more as measured by:
dripping water onto a sample of a plurality of the water-repellant grain placed on a strainer, and
1 minute after the dripping, calculating a ratio of water that is passed through the strainer compared to a total amount of water dripped onto the sample.
2. The excrement treatment material according to claim 1 ,
wherein the water-repellent grain contains a coloring material that gradually changes from the first color to the second color as time passes.
3. The excrement treatment material according to claim 2 ,
wherein the coloring material is exposed on a surface of the water-repellent grain.
4. The excrement treatment material according to claim 2 ,
wherein the coloring material changes from the first color to the second color due to fading.
5. The excrement treatment material according to claim 2 ,
wherein the coloring material changes from the first color to the second color due to oxidation.
6. The excrement treatment material according to claim 1 ,
wherein the water-repellent grain is configured so as to exhibit the second color when loss of a surface of the water-repellent grain reaches a predetermined amount.
7. The excrement treatment material according to claim 6 ,
wherein the water-repellent grain contains a coloring material that has the second color, and
the coloring material is present only in a region that is at a predetermined depth or more from the surface of the water-repellent grain.
8. The excrement treatment material according to claim 7 ,
wherein the coloring material is water-insoluble.
9. The excrement treatment material according to claim 1 ,
wherein the water-repellent grain is configured so as to exhibit the second color when moisture that has entered into the water-repellent grain reaches a predetermined amount.
10. The excrement treatment material according to claim 9 ,
wherein the water-repellent grain contains a coloring material that exhibits the second color upon reacting to moisture.
11. The excrement treatment material according to claim 10 ,
wherein the coloring material is present only in a region that is at a predetermined depth or more from a surface of the water-repellent grain.
12. A method for manufacturing an excrement treatment material constituted by a water-repellent grain, the method comprising:
a grain forming step of forming the water-repellent grain,
wherein:
in the grain forming step, the water-repellent grain is formed so as to exhibit a first color before being used and exhibit a second color that is different from the first color when it is time to replace the water-repellent grain, and
the water-repellent grain before being used has a water repellency of 80% or more as measured by:
dripping water onto a sample of a plurality of the water-repellant grain placed on a strainer, and
1 minute after the dripping, calculating a ratio of water that is passed through the strainer compared to a total amount of water dripped onto the sample.
13. The method for manufacturing the excrement treatment material according to claim 12 ,
wherein in the grain forming step, a granule that constitutes the water-repellent grain is formed through extrusion granulation.
14. The method for manufacturing the excrement treatment material according to claim 12 ,
wherein in the grain forming step, the water-repellent grain is formed containing a coloring material that gradually changes from the first color to the second color as time passes.
15. The method for manufacturing the excrement treatment material according to claim 14 ,
wherein in the grain forming step, the water-repellent grain is formed such that the coloring material is exposed on a surface of the water-repellent grain.
16. The method for manufacturing the excrement treatment material according to claim 12 ,
wherein in the grain forming step, the water-repellent grain is formed so as to exhibit the second color when loss of a surface of the water-repellent grain reaches a predetermined amount.
17. The method for manufacturing the excrement treatment material according to claim 16 ,
wherein in the grain forming step, the water-repellent grain is formed such that a coloring material having the second color is present only in a region that is at a predetermined depth or more from the surface of the water-repellent grain.
18. The method for manufacturing the excrement treatment material according to claim 12 ,
wherein in the grain forming step, the water-repellent grain is formed so as to exhibit the second color when moisture that has entered into the water-repellent grain reaches a predetermined amount.
19. The method for manufacturing the excrement treatment material according to claim 18 ,
wherein in the grain forming step, the water-repellent grain is formed containing a coloring material that exhibits the second color upon reacting to moisture.
20. The method for manufacturing the excrement treatment material according to claim 19 ,
wherein in the grain forming step, the water-repellent grain is formed such that the coloring material is present only in a region that is at a predetermined depth or more from a surface of the water-repellent grain.