Method for insulating thermal devices

Details Method for insulating thermal devices Method for insulating thermal devices

1990-03-19

1991-11-19

Dawson, Robert A.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 466, 264102, B29C 6722

Patent

active

050664379

ABSTRACT:
A method for insulating thermal devices with a composite insulation system including an evacuated powder and a plastic foam. A formed plastic part divides the insulation space between the outer case and inner liner into sectors. Some sectors are filled with a finely divided powder, the remaining sectors are filled with foam, for example, polyurethane. A vacuum is applied to the powder filled sectors while the foam is expanding and curing.

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