초록 ▼

A non-flexible, non-resilient recurable cellular material, prepared by exposing cured polyimide foam to an atmosphere of steam at an elevated pressure, is introduced into a honeycomb or like structure so that the cells are at least partially filled with the recurable cellular material. The cellular

A non-flexible, non-resilient recurable cellular material, prepared by exposing cured polyimide foam to an atmosphere of steam at an elevated pressure, is introduced into a honeycomb or like structure so that the cells are at least partially filled with the recurable cellular material. The cellular material is then cured while contained within such cells to form a composite polyimide foam-containing structure. Laminates may be applied to either or both faces of the polyimide foam-containing cellular structure. These articles possess enhanced strength, yet are lightweight and flame resistant, and thus useful for structural, vibration damping and thermal insulation applications.

대표청구항 ▼

A process of forming a composite polyimide foam-containing article which comprises: (i) exposing cured polyimide foam to an atmosphere of steam at an elevated pressure so that said foam is converted into a body of non-flexible, non-resilient, recurable cellular material; (ii) pressing said body of n

A process of forming a composite polyimide foam-containing article which comprises: (i) exposing cured polyimide foam to an atmosphere of steam at an elevated pressure so that said foam is converted into a body of non-flexible, non-resilient, recurable cellular material; (ii) pressing said body of non-flexible, non-resilient, recurable cellular material into a structure having a plurality of walls defining a plurality of laterally spaced open cells so that said open cells are at least partially filled with said recurable cellular material; and (iii) heating said recurable cellular material to cause it to cure while contained within said structure to form said composite polyimide foam-containing article.