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United States Patent | 4,061,812 |
Gilwee, Jr. , et al. | December 6, 1977 |
A honeycomb-laminate composite structure comprising A. a cellular core of a polyquinoxaline foam in a honeycomb structure, and B. a layer of a non-combustible fibrous material impregnated with a polyimide resin laminated on the cellular core, A process for producing the honeycomb-laminate composite structure and articles containing the honeycomb-laminate composite structure.
Current U.S. Class: | 428/117 ; 106/18.11; 106/18.14; 106/18.17; 106/18.21; 428/473.5; 428/71; 428/73; 428/920; 521/189 |
Current International Class: | B32B 3/12 (20060101); B29D 24/00 (20060101); B32B 003/12 () |
Field of Search: | 106/15FP 260/2.5N,2.5R 428/71,73,116,117,118,920,921,310-313,314-315,290 |
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