Claims
- 1. A method of fabricating a composite sheet comprising:
- providing a metal foil material,
- applying a layer of heat stable, thermoplastic material on a first surface of said foil material,
- applying a layer of a heat resistant, dielectric material on a second surface of said foil material,
- applying a layer of a heat resistant, heat absorptive material in at least two distinct layer thicknesses over said heat resistant, dielectric layer or portions thereof so as to provide a layer visually distinguishable from the heat resistant, dielectric layer,
- applying said heat resistant, heat absorptive material on a first portion of said dielectric material which is to be disposed within the lower one-half of a foil pouch formed from said foil stock and covering at least 10% of said dielectric material with a coating weight of about 1.50 to 4.00 pounds per ream, and
- applying said heat resistant, heat absorptive material on at least a second portion of said dielectric layer at about 15% to 70% less than the coating weight applied to said first portion.
- 2. The method of claim 1 comprising providing said layer of dielectric material by means of a material which is heat absorptive.
- 3. The method of claim 1 comprising applying said layer of heat resistant, heat absorptive material as a coating.
- 4. The method of claim 3 comprising applying said heat resistant, heat absorptive coating in at least two distinct layer thicknesses simultaneously.
- 5. The method of claim 4 comprising applying said heat resistant, heat absorptive coating over at least 60% of said dielectric material.
- 6. The method of claim 1 comprising:
- providing a minimum of about 5% by weight of a heat receptive additive in said heat resistant, heat absorptive material applied to said layer of heat resistant, dielectric material, and
- said heat receptive additive being characterized by a minimum emissivity of about 80%.
- 7. The method of claim 6 wherein said heat receptive additive is carbon black.
Parent Case Info
This is a division of application Ser. No. 223,489, filed Feb. 4, 1972, now U.S. Pat. No. 3,836,064.
US Referenced Citations (5)
Divisions (1)
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Number |
Date |
Country |
Parent |
223489 |
Feb 1972 |
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