Patent ID: 7771811

Claim:
A honeycomb having cells comprising a paper, the paper comprising: a) 5 to 50 parts by weight thermoplastic material having a melting point of from 180° C. 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 at least 30 percent by weight of the total amount of thermoplastic material is in the form of discrete film-like particles in the paper, the particles having a film thickness of about 0.1 to 5 micrometers and a minimum dimension perpendicular to that thickness of at least 30 micrometers, the film-like particles binding the high modulus fiber in the paper; and wherein the paper has a thickness of from 25 to 75 microns and a Gurley porosity of 2 seconds or greater.