E.i. Dupont De Nemours and Company

Warren Francis Knoff

Llewellyn Bentley Richardson, Iii

Christopher William Newton

Jian Wang

Nicole L Blankenbeckler

Laurence Nelson Bascom

Joseph Michael Donckers, Ii

Peter Popper

Paul W Yngve

Robert Edward Taylor

Steven K Shibata

Robert William McAllister

Theresa Ann Weston

Iii Richardson Llewellyn Bentley

Mikhail R Levit

Dariusz Wlodzimierz Kawka

Akhileswar G Vaidyanathan

James Edmond Van Trump

Reginald Thomas Kruszewski

Barry Rubin

Michael J Merrill

Llewellyn Bentley Richardson

Llewellyn Bentley Richardson Iii

Walter Randall Iii Hall

This invention is directed to a composite laminate comprising in order (a) a flame retardant polymeric moisture barrier (b) an inorganic platelet layer and (c) a flame retardant thermoplastic film layer The invention is also directed to a thermal insulation and acoustic blanket comprising a core of fibrous material or foam surrounded by the above composite laminate wherein the thermoplastic film layer of the composite laminate contacts and encapsulates the core.

Composite laminate for a thermal and acoustic insulation blanket

The present invention concerns methods for obtaining high-tenacity aramid yarn, wherein the yarn is made of a copolymer obtained from a mixture of monomers comprising 5-(6)-amino-2-(p-aminophenyl)benzimidazole, an aromatic para-diamine, and an aromatic para-diacid; the method comprising: a) spinning said copolymer from an inorganic acid solvent to produce the aramid yarn; b) washing said yarn with a basic aqueous solution for at least 5 seconds; and c) heating said yarn; wherein the yarn is heated in at least two process steps, characterized in that (i) in a first step the yarn is heated at a temperature of 200 to 360&#xb0; C. at a tension of at least 0.2 cN/dtex, followed by (ii) a second step wherein the yarn is heated at a temperature of 370 to 500&#xb0; C. at a tension of less than 1 cN/dtex. In some embodiments, the yarn has an effective polymer cation to sulfur content molar ratio of at least 0.3. In some embodiments, the yarn has a hydrolytic strength retention of the yarn is greater than 60%.

Copolymer fibers and yarns and processes for making same

The present invention concerns methods for obtaining high-tenacity aramid yarn, wherein the yarn is made of a copolymer obtained from a mixture of monomers comprising 5-(6)-amino-2-(p-aminophenyl)benzimidazole, an aromatic para-diamine, and an aromatic para-diacid. The method comprises: a) spinning said copolymer from an inorganic acid solvent to produce the aramid yarn; b) washing the yarn with a basic aqueous solution for at least 5 seconds; and c) heating the yarn; wherein the yarn is heated in at least two process steps, comprising (i) in a first step the yarn is heated at a temperature of 200 to 360&#xb0; C. at a tension of at least 0.2 cN/dtex, followed by (ii) a second step wherein the yarn is heated at a temperature of 370 to 500&#xb0; C. at a tension of less than 1 cN/dtex.

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

The present invention concerns yarns comprising copolymer derived from the copolymerization of para-phenylenediamine, 5(6)-amino-2-(p-aminophenyl)benzimidazole; and terephthaloyl dichloride wherein the ratio of moles of 5(6)-amino-2-(p-aminophenyl)benzimidazole to the moles of para-phenylenediamine is 30/70 to 85/15. The yarns have a sulfur content greater than 0.1%; and have an effective polymer cation to sulfur content molar ratio of at least 0.3. Additional aspects of the invention concern methods of producing such yarns.

Copolymer fibers and processes for making same

The present invention concerns yarns comprising copolymer derived from the copolymerization of para-phenylenediamine, 5(6)-amino-2-(p-aminophenyl)benzimidazole; and terephthaloyl dichloride wherein the ratio of moles of 5(6)-amino-2-(p-aminophenyl)benzimidazole to the moles of para-phenylenediamine is 30/70 to 85/15; the yarn having a sulfur content greater than 0.1%; and the hydrolytic strength retention of the yarn is greater than 60%. The invention also concerns processes for making such yarns.

Composite laminate  for a thermal and acoustic insulation blanket

This invention relates to a thin reinforced nonwoven fabric for fire blocking an article, articles containing such fabrics, and methods for making the fabrics and fire blocking the articles. When exposed to heat or flame, the fabric is capable of increasing its thickness by at least three times. The fabric comprises an open mesh scrim having a having crimped, heat-resistant organic fibers compressed thereon and held in a compressed state by a thermoplastic binder. When subjected to high heat or flame, the binder in the structure softens and flows, releasing the restrained crimped fibers and allowing the thickness of the fabric to increase dramatically.

Reinforced nonwoven fire blocking fabric, method for making such fabric, and articles fire blocked therewith

This invention relates to an improved gusset for use in fire-blocking a pillow-top mattress. This gusset provides additional fire blocking to provide a pillow-top mattress with improved performance when tested according to Technical Bulletin 603 of the State of California.

Pillow-top mattress comprising a fire blocked gusset

This invention relates to a thin reinforced nonwoven fabric comprising a liquid impervious polymeric layer, a compressed web of crimped fiber, a binder, and a reinforcing scrim. The fabric bulks when exposed to heat or flame and is useful as a component for fire blocking mattresses, upholstery, and the like.

Liquid water impermeable reinforced nonwoven fire blocking fabric, method for making such fabric, and articles fire blocked therewith

A process for spinning a fully water washed fluorinated olefinic polymer intermediate fiber structure from a mixture of an aqueous dispersion of particles of the fluorinated olefinic polymer and a solution of a cellulosic ether.

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Richmond, VA, United States of America

Warren Francis Knoff