Fabricating a phase change blood cooling system

A process for forming a flexible polymer pouch containing two containers which contain a phase change material consisting essentially of 98% 1-dodecanol, 1.5% myristyl alcohol and 0.5% 1-decanol and preparing the pouch for rapid cooling of blood bags filled with freshly drawn blood, wherein the pouch will be folded over to cover a major portion of each of the two largest surfaces of the blood bags for about 2 hours for the temperature of the blood in the blood bags to drop to 22° C.±2° C., the process comprising the steps of:

• forming said two inner containers for the phase change material using two first overlaying polymer sheets wherein a seal at the edges of said two first overlaying polymer sheets is completed after the phase change material is inserted between them;
• inserting the phase change material consisting essentially of 98% 1-dodecanol, 1.5% myristyl alcohol and 0.5% 1-decanol;
• forming one outer container for containing both of the inner containers using at least two second overlaying polymer sheets which are sealed along at least one axis to form two compartments;
• sealing at the edges of both said compartments of the outer container is completed after one of the inner containers is inserted into each compartment such that the second polymer sheets of the outer container overlay the outer surface of the first polymer sheets, to form the flexible polymer pouch;
• and preconditioning the flexible polymer pouch at about 22° C.