Abstract:
A blanket (10) formed of heat and flame resistant materials and adapted to be placed adjacent to a structural part (24) to isolate it thermally from other, adjacent structural parts (22). The blanket (10) is comprised of a layer (12) of insulation material coupled to a layer (18) of fibrous material impregnated with a thermosetting resin. When the blanket (10) is in a desired shape, the resin is cured to render the layer (18) of fibrous material substantially rigid so it can support itself as well as the layer (12) of insulating material coupled to it. Layers (14) and (16) of glass fabric are placed on opposed sides of the layer (12) of insulating material to keep the insulating material intact. In one application, the blanket (10) is molded in the form of a box-like structure which can at least partially surround a structural part, such as an aircraft engine (24), to form a fireshield to isolate the engine (24) from adjacent structural partsof an aircraft. In another application, the resin-impregnated layer (18) of fibrous material of the blanket (10) is placed adjacent to one surface of a structural part and bonded thereto during the curing of the resin to thereby form a fireshield attached to the structural part. In a third application, the resin-impregnated layer (18) of fibrous material is used without the layer (12) of insulating material and, when the resin is cured, the layer (18) is rigid and forms a box-like structure for at least a partially enclosing a structural part.
Abstract:
A composition particularly appropriate for retention materials, prints for external prostheses or other fixing elements, is comprised of 90 to 60 parts by weight of a cyclic ester polymer having a molecular weight comprised between 20000 and 300000 and 10 to 40 parts by weight of ethylene copolymer-vinyl acetate having a viscosity index comprised between 0.5 and 12 and having a vinyl acetate content from 10 to 60 % by weight.
Abstract:
A removable stowage bin assembly (10) for quick conversion of an aircraft between a passenger-carrying mode and a cargo-carrying mode includes a stowage bin (14) and a first assembly comprised of a clevis fitting (32) attached to the framework of the aircraft (48) and a hook (34) attached to the stowage bin (14), the hook (34) being removably and pivotally attachable to the clevis fitting (32). A second assembly is comprised of a tie rod (54) having a first end pivotally attached to the framework of the aircraft (48) and a bracket (62) attached to the stowage bin (14). The tie rod (54) has a second end attachable to the framework of the aircraft (48) in a cargo-carrying mode. A third assembly is comprised of a female fitting (79) having an opening and attached to one of the framework of the aircraft (48) and the stowage bin (14), and a male fitting (84) having a protrusion and attached to the other end of the framework of the aircraft (48) and the stowage bin (14). The protrusion of the male fitting (84) is mateable in the opening of the female fitting (79) in the passenger-carrying mode.
Abstract:
A non-metallic honeycomb structure (10) wherein the thermal conductivity of the structure is increased by incorporating high thermal conductivity pitch-based carbon fibers (20) into the non-metallic resin matrix. In addition to increasing thermal conductivity, the pitch-based carbon fibers (20) are utilized to provide controlled directional heat conductance through the honeycomb structure (10).
Abstract:
A non-metallic honeycomb structure (10) wherein the thermal conductivity of the structure is increased by incorporating high thermal conductivity pitch-based carbon fibers (82) into the non-metallic resin matrix. In addition to increasing thermal conductivity, the pitch-based carbon fibers (82) are utilized to provide controlled directional heat conductance through the honeycomb structure (10). In one preferred embodiment, the pitch-based fibers (82) are oriented to extend at an angle of plus or minus 55 to 60 degrees relative to the lengthwise direction of the honeycomb structure to provide optimum performance characteristics at a reduced cost.
Abstract:
A non-metallic honeycomb structure (10) wherein the thermal conductivity of the structure is increased by incorporating high thermal conductivity pitch-based carbon fibers (20) into the non-metallic resin matrix. In addition to increasing thermal conductivity, the pitch-based carbon fibers (20) are utilized to provide controlled directional heat conductance through the honeycomb structure. In a preferred exemplary embodiment, the cell walls (80) are formed from a plurality of non-metallic unidirectional fabric layers (82, 84, 86), at least one of which consists essentially of unidirectionally oriented high thermal conductivity fibers.
Abstract:
A composite pre-slit tape useful as a protective carrier system for storing and handling high modulus fibers and processes for protecting such fibers are disclosed. An exemplary composite pre-slit tape (12) includes a plurality of generally elongated and collimated pre-slit laminates (28, 30, 32) oriented in a single plane and releasably bonded to a removable continuous backing layer (33) which is in the form of a long thin tape. Each pre-slit laminate includes an adhesive layer (34) located adjacent the continuous backing layer and a fiber supporting layer (36) located adjacent the adhesive layer (34). In use as a fiber protective carrier (10), each pre-slit laminate (28, 30) is bonded to a fiber bundle (22, 24) of a plurality of collimated fibers (14, 16, 18, 20) arranged in a single layer. Each fiber (14, 16, 18, 20) is bonded along its length to the supporting layer (36) of the pre-slit laminate (28, 30). The combination of secured fibers and pre-slit laminate can be fed directly to a loom for forming woven fabric.
Abstract:
Ceramic binder compositions used in ceramic formulations for molding ceramic parts are disclosed. The ceramic binder compositions are solutions of at least one polymer, at least one reactive monomer, solvent, and initiator. When the ceramic binder solutions are combined with ceramic raw materials, the resulting ceramic formulations have exceptional tack and drape properties which make them useful for molding large and intricately shaped three dimensional ceramic green parts. The green parts can be set using conventional polymeric processing techniques and have improved strengths.
Abstract:
A ceramic body of controlled porosity is formed by coating unidirectional fiber carriers with a hardenable liquid resin bearing powdered ceramic material, which resin is subsequently cured, hardened, or cooled to provide a green body which may be assembled with similar layers, in a desired shape, and subsequently sintered, to form a ceramic body having continuous pores corresponding to the position of the fibers.