IMPACT AND KNIFE CUT RESISTANT PRE-IMPREGNATED WOVEN FABRIC FOR AIRCRAFT HEATED FLOOR PANELS
FIG3 is a schematic drawing of a 2-D woven impact layer with a high temperature thermoplastic fiber matrix for a floor panel assembly
FIG3 is a schematic drawing of 2-D woven impact layer 30 with a high temperature thermoplastic fiber matrix for a floor panel assembly. Woven impact layer 30 includes first x-fibers 32, y-fibers 34, and resin 38. Weaving patterns may be plain woven, twill, satin, jersey knit, or interlock knit. Like in FIG3, x-fibers 42 are high temperature thermoplastic fibers, and resin 48 is a phenolic or epoxy resin. However, y-fibers 44 are metallic fibers. Thus, impact layer 40 is a composite layer. In alternative embodiments, x-fibers can be metallic and y-fibers can be a high temperature thermoplastic. Generally, metallic fibers should be no more than 50% of fibers in the matrix to reduce the weight of impact layer 40. Additionally, the x-fibers and the y-fibers can alternate between a high temperature thermoplastic and a metallic fiber, with the size of the fiber thread dictating the exact percentage of metallic fibers in the woven matrix.
schematic
30
impact layer
38
Resin
48
resin
40
impact layer
42
x-fibers
32
x-fibers
['1. A floor panel assembly (10) having a bottom surface (12) and a top surface (14), the floor panel assembly comprising: a first stack of structural layers (16) adjacent the bottom surface (12); a core layer (18), adjacent the first stack of structural layers (16), that absorbs shear stress; a second stack of structural layers (20) between the core layer (18) and the top surface (14); a heating layer (22) between the core layer (18) and the top surface (14); and a woven impact layer (24) between the heating layer (22) and the top surface (14), the impact layer (24) comprising: a woven high temperature thermoplastic fiber matrix; and a resin infiltrating the woven fiber matrix.']