Patent ID: 6284188
Filing Date: 2001-09-04
Classification: C04B

Abstract:
A process for producing a honeycomb structural body composed mainly of cordierite which comprisesadding a molding aid to a powder of a cordierite starting material, wherein said molding aid used is a mixture of polyalkylene glycol and a polyhydric alcohol selected from the group consisting of glycerin and diethylene glycol such that the mixing ratio represented by the following equation: mixing ratio+polyhydric alcohol/(polyalkylene glycol+polyhydric alcohol) is in the range of 0.895-0.995,kneading the mixture and extrusion molding if the an extrusion molding die with honeycomb-shaped slits,and then firing it, wherein the maximum particle size of the powder of said cordierite starting material is limited to no greater than 85% of the slit width of said extrusion molding die, at least talc is used as said cordierite starting material, and the mean particle size thereof is 5 mm or greater.