초록 ▼

A microwavable thermal pack and a method of heating the pack. The thermal pack is a completely sealed envelope constructed from opposed laminate layers, portions of which are joined by sealed seams. The layers define an inner chamber within which is disposed a heat transfer material. Each of the lam

A microwavable thermal pack and a method of heating the pack. The thermal pack is a completely sealed envelope constructed from opposed laminate layers, portions of which are joined by sealed seams. The layers define an inner chamber within which is disposed a heat transfer material. Each of the laminate layers includes a pair of co-extensive inner and outer films contacting each other throughout their surface areas. The films are selected so that the laminate layers of the thermal pack do not pass the heat transfer material during heating of the heat transfer material within the thermal pack which is equivalent to the energy developed by a microwave device operating at full power for a period of time greater than about one minute but less than about four minutes.

대표청구항 ▼

A process of microwave heating a thermal pack comprising the steps of: providing a thermal pack comprising a completely sealed envelope constructed from opposed laminate layers, said layers defining an inner chamber within which is disposed a heat transfer material, said chamber being sealed from th

A process of microwave heating a thermal pack comprising the steps of: providing a thermal pack comprising a completely sealed envelope constructed from opposed laminate layers, said layers defining an inner chamber within which is disposed a heat transfer material, said chamber being sealed from the exterior of said thermal pack, each of said laminate layers including a pair of co-extensive inner and outer films contacting each other throughout their surface ares, said films being of dissimilar materials; applying microwave energy to said pack for heating said heat transfer material to a desired temperature; and selecting the dissimilar materials so that the laminate layers of said thermal pack do not pass said heat transfer material during heating of said thermal pack and do not rupture or separate at the seams thereof when subjected to said microwave energy which is equivalent to the energy developed by a microwave heating device operating at full power of about 750 watts for a period of time greater than about one minute but less than about four minutes.