Patent ID: 7815993

Claim:
A honeycomb having cells comprising a flame resistant non-woven paper, the cells being expanded paper sheets bonded to each other along a number of node lines of applied adhesive; the non-woven paper comprising: a) 5 to 50 parts by weight thermoplastic material having a melting point of from 180° to 300° 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 paper, wherein the thermoplastic has a limiting oxygen index of at least 26; and wherein the thermoplastic material is required to flow in a manner of a viscous liquid when heated and solidify when cooled and do so reversibly time and time again on subsequent heating and cooling steps.