E.i. Dupont De Nemours and Company

Nutrition & Biosciences USA 4, Inc.

Other

Dupont Safety & Construction, Inc.

Mikhail R Levit

Gary Lee Hendren

Achim Amma

Subhotosh Khan

Vlodek Gabara

Jayme L Paullin

Michael Robert Samuels

Dariusz Wlodzimierz Kawka

Laurence Nelson Bascom

Arthur Russell Nelson

Edmund A Merriman

Jaime A Ampuero Auza

Stephen D Maloney

Iii Richardson Llewellyn Bentley

Natnael Behabtu

Warren Francis Knoff

Ioannis V Bletsos

Llewellyn Bentley Richardson, Iii

Byoung Sam Kang

Jill A Conley

Olivier Lengwiler

Yves Klett

Rainer Kehrle

Joseph Robert Guckert

Bruce A Yost

Kevin A Mulcahy

Peter J Hollberg

Roger Curtis Wicks

Xun Ma

Brian Keith Trask

Brian P Little

David Carl Roberts

Peter John Hollberg

Brian Paul Little

Roger K Siemionko

Llewellyn Bentley Richardson Iii

Subhotosh Kahn

Fibrids comprising poly alpha-1,3-glucan or surface-modified poly alpha-1,3-glucan were produced and characterized. Applications and products for using these fibrids include emulsification, viscosity modification, paper and paper making, personal care products, pharmaceutical products, food products, paper coatings, and composites. Examples of surface-modified poly alpha-1,3-glucan fibrids include those with a positive surface charge.

Poly alpha-1,3-glucan fibrids and uses thereof and processes to make poly alpha-1,3-glucan fibrids

Disclosed herein are poly alpha-1,3-glucan fibrids and methods for making them. The fibrids have a fibrous shape with an average length of between 10 &#x3bc;m and 10 mm and width of between 200 nm and 200 &#x3bc;m. Also disclosed are uses for the fibrids, including paper-making and as a viscosity modifier in making formulations for applications such as laundry applications and personal care applications, and as an emulsifier in food.

A method of making a fiber-reinforced composite structure comprises the steps of (i) forming a paper sheet having a Gurley air resistance at least 200 seconds per 100 milliliters, the sheet comprising from 30 to 70 weight percent p-aramid fiber, (ii) depositing on both surfaces of the paper sheet a compression enhancing layer in a quantity up to 5 weight percent based on the weight of the paper, (iii) forming a honeycomb from the sheet of step (ii), and (iv) applying a matrix resin coating to the honeycomb of step (iii).

Honeycomb core having a high compression strength

A method of making a composite sandwich panel comprises the steps of (i) making a core structure, (ii) making at least one facesheet, (iii) bonding at least one of the at least one facesheets to the core structure, wherein the growth of a carbon nanotube structure is achieved during at least one of steps (i) to (iii).

Method of making a sandwich panel

A multilayer structure particularly useful in a transformer which contains

Multilayer structure useful for electrical insulation

The invention concerns a paper comprising polypyridobisimidazole floc having a length of from 1.0 to 15 mm, where the apparent density of the paper is from 0.1 to 0.4 g/cmand the tensile strength of the paper in N/cm is at least 0.000052X*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 floc and process for making the same

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

This invention relates to a pressboard comprising a plurality of plies having thermostable floc and at least 40 weight percent aramid fibrids, the pressboard having a final average thickness of 0.9 mm or greater, the pressboard further having an a void content of 25 volume percent or less and a ply adhesion (Y) in megapascals defined by the equation&#x3e;2.97()wherein (X) is the thickness of the pressboard in millimeters; the pressboard can have a compressibility of 1.6 percent or less and compression set of 0.18 percent or less.

Sheet structures having improved compression performance

Porous fibrous sheets are provided that are useful in end uses requiring microbial barrier properties such as medical packaging and medical gowns and drapes. The porous fibrous sheets may contain nanofibers and wood pulp.

Porous fibrous sheets of nanofibers

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

High compression strength honeycomb is made from polymer paper containing 5 to 35 parts by volume solid material and 65 to 95 parts by volume voids having a normalized peak load at bend equal or greater than 0.33 mgf/(g/m2)^3 and a Gurley air resistance equal or greater than 50 seconds/100 ml.

Honeycomb having a high compression strength and articles made from same

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

This invention relates to a tape made from an aramid paper, and a process for making the paper, the papers comprising 5 to 65 parts by weight aramid fiber, 30-90 parts by weight aramid fibrids, and 1-20 parts by weight of conductive filler, based on the total weight of the aramid fiber, fibrids, and filler; the paper having an apparent density of not more than 0.43 g/cmand a tensile index not less than 60 Nm/g.

Electroconductive aramid paper and tape made therefrom

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

This invention relates to papers made with fibrids containing a polymer or copolymer derived from a monomer selected from the group consisting of 4,4'diaminodiphenyl sulfone, 3,3&#x2032;diaminodiphenyl sulfone, and mixtures thereof. Such papers have high thermal stability and accept ink more readily than papers made solely with aramid fibrids.

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Glen Allen, VA, United States of America

Mikhail R Levit