E.i. Dupont De Nemours and Company

Achim Amma

Mikhail R Levit

Edmund A Merriman

Kevin A Mulcahy

Stephen D Maloney

Steven M Hansen

Arnold Frances

Andreas Graudus

The present invention relates to thermoplastic and polyareneazole pulp for use as reinforcement material in products including for example fluid sealing materials, as a processing aid including its use as a thixotrope, and as a filter material. The pulp comprises (a) irregularly shaped, thermoplastic fiber fibrous structures, (b) irregularly shaped, polyareneazole fibrous structures and (c) water, whereby thermoplastic fiber fibrils and/or stalks are substantially entangled with polyareneazole fibrils and/or stalks. The invention further relates to processes for making such thermoplastic and polyareneazole pulp.

Polyareneazole/thermoplastic pulp and methods of making same

The present invention relates to thermoset and polyareneazole pulp for use as reinforcement material in products including for example fluid seals and friction materials, as a processing aid including its use as a thioxotrope, and as a filter material. The pulp comprises (a) irregularly shaped, thermoset fiber fibrous structures, (b) irregularly shaped, polyareneazole fibrous structures and (c) water whereby thermoset fiber fibrils and/or stalks are substantially entangled with polyareneazole fibrils and/or stalks. The invention further relates to processes for making such thermoset and polyareneazole pulp.

Polyareneazole/thermoset pulp and methods of making same

The present invention relates to fibrous pulp comprising a combination of polypyridobisimidazole fibrous structures and fibrous structures derived from another polymer. The invention further relates to processes for making such pulp and articles comprising the pulp.

Pulp comprising polypyridobisimidazole and other polymers and methods of making same

A process for forming a fiber optical cable assembly comprises the steps of (a) subjecting a first high tenacity reinforcement yarn such as para-aramid that is coated with a water-impermeable thermally reversible cross-linked polymeric coating to a temperature of from 45 to 200 &#xb0; C. for sufficient time to convert the protective coating via bond cleavage into a water-swellable super absorbent polymer, (b) combining one or more of the first reinforcement yarns from step (a) with one or more optical glass fiber transmission media and (c) applying a protective sleeve over at least one assembly of step (b).

Method of making a fiber optical cable assembly

The present invention relates to wood pulp and polyareneazole pulp for use as reinforcement material in products including for example friction materials, fluid sealing materials, and papers. The pulp comprises (a) irregularly shaped, wood pulp fibrous structures, (b) irregularly shaped, polyareneazole fibrous structures, and (c) water, whereby wood pulp fibrils and/or stalks are substantially entangled with polyareneazole fibrils and/or stalks. The invention further relates to processes for making such wood pulp and polyareneazole pulp.

Polyareneazole/wood pulp and methods of making same

The invention concerns a paper comprising (a) 40 to 70 parts by weight of polypyridobisimidazole fiber, polypyridobisimidazole pulp, or mixtures thereof and (b) 30 to 60 parts by weight of friction modifiers, structural resins, wet-strength resins, processing aids, fillers, and mixtures thereof; the parts by weight being based on the total amount of a) and b) in the paper.

Friction papers comprising PIPD fiber

The present invention relates to para-aramid pulp including meta-aramid fibrids for use as reinforcement material in products including for example friction materials, fluid sealing materials, and papers. The invention further relates to processes for making such pulp.

Para-aramid pulp including meta-aramid fibrids and processes of making same

The invention concerns a paper comprising polypyridobisimidazole fibers, where the apparent density of the paper is from 0.1 to 0.5 g/cmand the tensile strength of the paper in N/cm is at least 0.00057X*Y, where X is the volume portion of polypyridobisimidazole in the total solids of the paper in % and Y is basis weight of the paper in g/m.

Paper comprising PIPD pulp and process for making same

A flexible hose for conveying fluids or gases comprises two elastomeric layers surrounding either side of a reinforcement layer.

Flexible hose for conveying fluids or gases

The invention concerns a process for making a fibrillated polypyridobisimidazole floc comprising the steps of: cutting polypyridobisimidazole filaments to an average cut length of from about 0.5 to 10 mm; and applying energy to the polypyridobisimidazole filaments to produce a fibrillated floc having essentially the same average cut length after the application of energy as before the application of energy; where the fibrillated floc having a Canadian Standard Freeness (CSF), when dispersed in water by itself, of from about 400 to 750 ml.

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Richmond, VA, United States of America

Achim Amma