Breathable low-emissivity metalized sheets

A metalized composite sheet comprising:

• a porous flash spun plexifilamentary sheet layer having first and second outer surfaces and at least one multi-layer coating comprising:
• a metal coating layer having a thickness between about 15 nanometers and 200 nanometers deposited on the first outer surface of the flash spun plexifilamentary sheet layer, said metal selected from the group consisting of aluminum, silver, copper, gold, tin, zinc, and their alloys;
• and
• an outer organic coating layer of a composition containing a cross-linked polyacrylate having a thickness between about 0.2 micrometer and 1 micrometer deposited on the metal layer;
• wherein the multi-layer coating substantially covers the outer surface of the flash spun plexifilamentary sheet while leaving the pores substantially uncovered.

A metalized composite sheet comprising:

• a porous flash spun plexifilamentary sheet layer having first and second outer surfaces and at least one multi-layer coating comprising:
• an intermediate organic coating layer of a composition containing a cross-linked polyacrylate having a thickness between about 0.02 micrometer and 1 micrometer deposited on the first outer surface of said flash spun plexifilamentary sheet layer;
• a metal coating layer having a thickness between about 15 nanometers and 200 nanometers deposited on said intermediate organic coating layer, said metal selected from the group consisting of aluminum, silver, copper, gold, tin, zinc, and their alloys;
• and
• an outer organic coating layer of a composition containing a cross-linked polyacrylate having a thickness between about 0.2 micrometer and 1 micrometer deposited on the metal layer;
• wherein the multi-layer coating substantially covers the outer surface of the flash spun plexifilamentary sheet while leaving the pores substantially uncovered.