Patent ID: 8795551

Claim:
A water absorbing material comprising: a waste material having a content of 20 wt % to 90 wt % to a total weight of the water absorbing material, and including two or more chemically distinct plastic materials; and the water absorbing material being granular, and having: an ignition point of 400° C. or greater, an ash content of 20 wt % or less, a calorific value in a range of 2930 J/g (700 kcal/kg) to 10465 J/g (2500 kcal/kg) in a state after absorbing moisture that has a weight in a range of 1.1 to 1.6 times the total weight of the water absorbing material before absorbing moisture, and a carbon dioxide yield in a range of 1700 g/kg to 2500 g/kg, the water absorbing material having a multi-layer structure having a granular core portion and a coating layer portion, and the coating layer portion comprising water-soluble powder of a coloring material which is configured to develop a color upon contact with external moisture, and which is directly contained in the coating layer portion.