Patent ID: 7740741
Filing Date: 2010-06-22
Classification: C09K,D21B,D21D,D21H,F16D

Abstract:
1. A process for making a para-aramid pulp including meta-aramid fibrids for use as reinforcement material, comprising: (a) combining pulp ingredients including: (b) mixing the ingredients to a substantially uniform slurry, wherein random samples of the slurry contain the same wt % of the concentration of each of the starting ingredients as in the total ingredients in the combination step plus or minus 10 wt % (c) co-refining the slurry by simultaneously: (d) removing water from the refined slurry, thereby producing a meta- and para-aramid pulp with the para-aramid fibrous structures contacting and wrapped partially around at least some of the refined meta-aramid fibrids.