FOERFARANDE FOER FRAMSTAELLNING AV POROEST PAPPER

摘要

1. A process for making filter materials for oil and air filters of internal combustion engines by impregnating a porous cellulose-based paper substrate with a dispersion of at least one resin and/or monomer which can be hardened by electron beam irradiation and subsequently hardening with electron beam irradiation, characterised in that the impregnation is conducted on a paper web in the paper-making machine with an aqueous emulsion having a resin and/or monomer content of 15 to 70 weight %, wherein the paper web consists predominantly of long-fibred cellulose which has a low beating degree of 13 to 15 SR degrees.