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US Patent 7455750 Meta- and para-aramid pulp and processes of making same

Patent 7455750 was granted and assigned to E.I. Du Pont De Nemours And Company on November, 2008 by the United States Patent and Trademark Office.

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Patent abstract

The present invention relates to meta- and para-aramid pulp for use as reinforcement material in products such as seals and friction materials. The pulp comprises (a) fibril free meta-aramid particles, (b) irregularly shaped, para-aramid fibrous structures, and (c) water, whereby the para-aramid fibrous structures contact and are wrapped partially around at least some of the meta-aramid particles. The invention further relates to processes for making such aramid pulp.

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