Honeycomb structure of aromatic polyimide

Details Honeycomb structure of aromatic polyimide Honeycomb structure of aromatic polyimide

1989-01-27

1990-05-01

Epstein, Henry F.

Stock material or miscellaneous articles

Structurally defined web or sheet

Honeycomb-like

52806, 156197, 4284735, B32B 312

Patent

active

049217445

ABSTRACT:
A new honeycomb core structure of heat-resistant aromatic polyimide is disclosed. The structure comprises plural aromatic polyimide sheets having a second-order transition temperature in the range of 250.degree. C. to 400.degree. C. wherein adjoining aromatic polyimide sheets are adhered to each other by welding the two sheets in regions apart from each other at equal intervals and the welding regions on one side of any aromatic polyimide sheet are located at positions shifted from positions of welding regions arranged on another side of the sheet. The honeycomb structure is formed by extending the combined aromatic polyimide sheets in the direction vertical to the plane of the polyimide sheets while heating the sheets at a temperature higher than their second-order transition temperature.

REFERENCES:
patent: 4197341 (1980-04-01), Rule
patent: 4453367 (1984-06-01), Geyer et al.
patent: 4659598 (1987-04-01), Traut
patent: 4767656 (1988-08-01), Chee et al.
Honeycomb Materials and Applications, An Article by John I. Corden and Thomas N. Bitzer--Hexcel Corp., Dublin, CA.--32nd International Sampe Symposium, Apr. 6-9, 1987.

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