Cellular phone casing
A cellular phone case in combination with a flexible packet holding an admixture of water and super absorbent material to provide heat dissipation, heat indication, and fire extinguishment properties. The cellular phone case has a translucent rear surface and the packet fits inside the case between the bottom surface of the case and the underside of a cellular phone. The packet dissipates heat during a recharging condition, and provides a fire retardant agent to arrest a lithium battery meltdown.
1. A cellular phone case comprising:
a casing for receipt of cellular phone, said receptacle having a translucent back wall to be positioned against a rear surface of a cellular phone;
a packet containing about 3 ounces of an admixture of hydrated superabsorbent polymer positioned between said translucent wall and the rear surface of the cellular phone;
a color additive having a thermochromic pigment capable of changing colors added to said admixture, said color additive visually discernible through said translucent wall and capable of changing colors when said admixture is subjected to a temperature change;
wherein a cellular phone positioned within receptacle is juxtaposition with said packet which is viewable through said translucent wall.
2. The cellular phone case according to claim 1 including a second thermochromic pigment added to said admixture, wherein said first thermochromic pigment changes colors when subjected to a first temperature change and said second thermochromic pigment changes colors when subjected to a second temperature change.
3. The cellular phone case according to claim 1 wherein said color additive is a blue cobalt or red iron oxide.
4. The cellular phone case according to claim 1 wherein said color additive is present in a percent dry weight from about 1% to about 10% of total weight of the admixture.
5. The cellular phone case according to claim 1 wherein said color additive is a leuco dye.
6. The cellular phone case according to claim 1 wherein said color additive is a liquid crystal cholesteryl ester or liquid crystal cyano-biphenyls.