Alliedsignal Inc.

Dsm IP Assets B.v.

Allied Corporation

Honeywell International Inc.

David S Cordova

Kevin M Kirkland

Stanley D Lazarus

Hugh H Rowan

Cyril Clerici

David R Coffin

Harm Van Der Werff

Robert M Marshall

Gene C Weedon

Leroy C Lin

Steven A Young

Mark B Boone

Charles P Weber, Jr

Ashok Bhatnagar

John Armstrong Young

Robert C Wincklhofer

Colleen W Cordova

Eelco Van Oosterbosch

Gregory J LaCasse

Chae Thompson

Rob R Gordon, Jr

Greogry J LaCasse

Robert C Hofer

Harm Vam Der Werff

Chris Griffin

Eelco Oosterbosch Van

The invention relates to a material comprising at least one laminate component containing polymeric fibers wherein the material has a loss tangent of less than 8&#xd7;10radians as measured at a frequency chosen from the group of frequencies consisting of 1.8 GHz; 3.9 GHz; 10 GHz; 39.5 GHz; and 72 GHz.

Material for radomes and process for making the same

Sheet for use in antiballistic articles

Rubberized polyolefin fabrics, particularly rubberized polyolefin fiber containing fabrics and a method for vulcanizing rubber without melting or lowering the performance of the fibers. A plurality of fibrous layers are molded and rubberized under high pressures, producing fabrics having customized stiffness properties.

Polyolefin fiber reinforced rubber

An armor system useful, for example, as a shroud, comprising a first pliable, cut resistant fibrous layer and a second pliable fibrous layer is disclosed. The first layer is arranged to receive an impact from a large projectile prior to the second layer and engages the projectile to slow its velocity. The second layer is substantially coextensive with the first and dissipates the incoming energy of the impact to resist complete penetration of the second layer by the projectile, preferably by deforming in response to the impact. Both layers comprise fibers having a tensile modulus of at least about 200 g/d, and an energy-to-break of at least about 8 J/g and a tenacity equal to or greater than about 10 g/d. In another embodiment, the layers are reversed relative to the impact face of the system so that the second layer becomes the first layer and is resistant to projectiles impacting the system, while the first layer becomes the second layer and resists deformation of the system by projectile impacts. Any projectile which completely penetrates the first layer is engaged by the second layer to slow its velocity and prevent complete penetration of the second layer. This armor system provides excellent ballistic resistance with enhanced deformation control.

Armor systems

An armor system useful, for example, as a shroud, comprising a first pliable, cut resistant fibrous layer and a second pliable fibrous layer is disclosed. The first layer is arranged to receive an impact from a large projectile prior to the second layer and engages the projectile to slow its velocity. The second layer is substantially coextensive with the first and dissipates the incoming energy of the impact to resist complete penetration of the second layer by the projectile, preferably by deforming in response to the impact. Both layers comprise fibers having a tensile modulus of at least about 200 g/d, and an energy-to-break of at least about 8 J/g and a tenacity equal to or greater than about 10 g/d. In another embodiment, the layers are reversed relative to the impact face of the system sq that the second layer becomes the first layer and is resistant to projectiles impacting the system, while the first layer becomes the second layer and resists deformation of the system by projectile impacts. Any projectile which completely penetrates the first layer is engaged by the second layer to slow its velocity and prevent complete penetration of the second layer. This armor system provides excellent ballistic resistance with enhanced deformation control.

A flexible, uncoated glove made from nonmetallic fabric comprising at least one fiber is disclosed. The glove is characterized by either weighing no more than about 30 g or having a thickness of no more than about 1.25 mm (0.05 inch), being cut resistant over some portion thereof by enduring without cutting through at least 5 cycles of an impact cam cut test, having compliance so that the wearer has a high degree of tactility, and having a cut resistance of at least 5 cycles of an impact cam cut test after a disinfectant treatment with sodium hypochlorite. The gloves are particularly useful in the medical field where they provide excellent cut protection and can be disinfected at least once while maintaining an acceptable level of cut resistance. In an alternate embodiment, a similarly characterized glove is made from a layer of fibrous material adhered to a surface of an elastomeric glove without being fully encapsulated thereby. This glove is also particularly useful in the medical field where it provides excellent cut protection.

Cut resistant protective glove

An essentially tack free prepreg article, characterized by a shelf life at about 25.degree. C. of at least about three months, and method of making the same are provided. The prepreg article comprises at least one network of fibers which has been impregnated with a solution of a resin in styrene and a catalyst. The resin is curable by the catalyst at a temperature above about 90.degree. C. The impregnated network is dried for a length of time and at a temperature sufficient to reduce the styrene content to less than about 1% by weight of the impregnated network without curing the resin. The prepreg article can subsequently be used as a component in a molded composite.

Extended shelf life prepreg article and method

A high tenacity fiber for reinforcing plastic composites, the fiber being selected from the group consisting of polyester, aliphatic polyamide, and combinations thereof. The fiber is treated with a composition comprising an aqueous solution of carboxyl-terminated, oil-free alkyd resins based on an aliphatic glycol or glycols or a glycol ether or ethers containing 2 to 12 carbon or carbon plus ether oxygens with a combination of aromatic di- or trifunctional carboxylic acids, said resins having a degree of esterification below the gel point of the resins to enhance stiffness of the fiber for cutting.

Fiber for reinforcing plastic composites and reinforced plastic

Growing community of inventors

Midlothian, VA, United States of America

David S Cordova