Patent ID: 7771809

Claim:
A honeycomb comprising cells having edges forming a face of the honeycomb, the face defined by a plurality of points and having an area of curvature wherein at least two of the points are located in different tangential planes, the cells being expanded paper sheets bonded to each other along a number of node lines of applied adhesive; the walls of the cells comprising a paper comprising: a) 5 to 50 parts by weight thermoplastic material having a melting point of from 120° C. to 350° C., and b) 50 to 95 parts by weight of a high modulus fiber having a modulus of 600 grams per denier (550 grams per dtex) or greater, based on the total amount of thermoplastic material and high modulus fiber in the walls, wherein the high modulus fiber comprises para-aramid polymer, or the high modulus fiber is selected from the group of polybenzazole fiber, polypyridazole fiber, and mixtures thereof; wherein less than 25 percent of the honeycomb cells in the area of curvature have a re-entrant angle of greater than 180 degrees, and wherein the honeycomb has at least one face under compression and at least one face under tension.