WATER ABSORPTION TREATMENT MATERIAL AND METHOD FOR MANUFACTURING THE SAME
A water absorption treatment material absorbs a liquid, and includes a grain. The grain has a water absorbing property. The grain is in an obliquely-cut columnar shape having a side surface, and first and second bottom surfaces.
1 . A water absorption treatment material that absorbs a liquid comprising:
a grain that has a water absorbing property,
wherein the grain is in an obliquely-cut columnar shape having a side surface, and first and second bottom surfaces.
2 . The water absorption treatment material according to claim 1 ,
wherein the first bottom surface obliquely intersects with a central axis of the grain.
3 . The water absorption treatment material according to claim 2 ,
wherein when an angle formed by the first bottom surface and the central axis is denoted by α°, the α satisfies 20≤α≤70.
4 . The water absorption treatment material according to claim 2 ,
wherein the second bottom surface obliquely intersects with the central axis.
5 . The water absorption treatment material according to claim 4 ,
wherein when an angle formed by the second bottom surface and the central axis is denoted by ß°, the ß satisfies 20≤ß≤70.
6 . The water absorption treatment material according to claim 4 ,
wherein the first and second bottom surfaces are simultaneously visible from a same direction perpendicular to the central axis.
7 . The water absorption treatment material according to claim 6 ,
wherein when a first plane is defined as a plane that passes a center of the first bottom surface and is perpendicular to the central axis, and a second plane is defined as a plane that passes a center of the second bottom surface and is perpendicular to the central axis,
a portion of the first bottom surface that is nearest to the second plane, and a portion of the second bottom surface that is nearest to the first plane exist on a same generating line of the side surface.
8 . The water absorption treatment material according to claim 1 ,
wherein the grain has a granular core portion, and a coating portion that covers a surface of the core portion.
9 . The water absorption treatment material according to claim 8 ,
wherein the coating portion covers only a part of the surface of the core portion.
10 . The water absorption treatment material according to claim 9 ,
wherein the core portion is exposed on the first bottom surface and/or the second bottom surface of the grain.
11 . A method for manufacturing a water absorption treatment material that absorbs a liquid, the method comprising:
a grain forming step of forming a grain that has a water absorbing property,
wherein in the grain forming step, the grain that is in an obliquely-cut columnar shape having a side surface, and first and second bottom surfaces is formed.
12 . The method for manufacturing a water absorption treatment material according to claim 11 ,
wherein in the grain forming step, the grain is formed such that the first bottom surface obliquely intersects with a central axis of the grain.
13 . The method for manufacturing a water absorption treatment material according to claim 12 ,
wherein when an angle formed by the first bottom surface and the central axis is denoted by α°, the α satisfies 20≤α≤70.
14 . The method for manufacturing a water absorption treatment material according to claim 12 ,
wherein in the grain forming step, the grain is formed such that the second bottom surface obliquely intersects with the central axis.
15 . The method for manufacturing a water absorption treatment material according to claim 14 ,
wherein when an angle formed by the second bottom surface and the central axis is denoted by ß°, the ß satisfies 20≤ß≤70.
16 . The method for manufacturing a water absorption treatment material according to claim 14 ,
wherein in the grain forming step, the grain is formed such that the first and second bottom surfaces are simultaneously visible from a same direction perpendicular to the central axis.
17 . The method for manufacturing a water absorption treatment material according to claim 16 ,
wherein when a first plane is defined as a plane that passes a center of the first bottom surface and is perpendicular to the central axis, and a second plane is defined as a plane that passes a center of the second bottom surface and is perpendicular to the central axis,
in the grain forming step, the grain is formed such that a portion of the first bottom surface that is nearest to the second plane, and a portion of the second bottom surface that is nearest to the first plane exist on a same generating line of the side surface.
18 . The method for manufacturing a water absorption treatment material according to claim 11 ,
wherein the grain forming step includes a core portion forming step of forming a granular core portion, and a coating portion forming step of forming a coating portion that covers a surface of the core portion.
19 . The method for manufacturing a water absorption treatment material according to claim 18 ,
wherein in the coating portion forming step, the coating portion is formed so as to cover only a part of the surface of the core portion.
20 . The method for manufacturing a water absorption treatment material according to claim 19 ,
wherein in the coating portion forming step, the coating portion is formed such that the core portion is exposed on the first bottom surface and/or the second bottom surface of the grain.