855 results about "Aramides" patented technology

An activatable (e.g., heat expandable) material and articles incorporating the same is disclosed. The material includes an epoxy resin; an epoxy/elastomer hybrid or reaction product; a blowing agent; a curing agent; and optionally, a filler. In preferred embodiments, the material includes aramid fiber, nanoclay or both.

The heterocycle-containing aromatic polyamide fibers of the invention are excellent in balance among mechanical characteristics, particularly balance among tensile strength, initial modulus and strength in the direction perpendicular to the fiber axis, exhibit a high strength holding ratio under heat and humidity, and are excellent in flame retardancy, bulletproofness and cutting resistance, as compared to conventional aromatic polyamide fibers, and therefore can be favorably used in fields with severe mechanical characteristics and have stability to environmental variation. Accordingly, the heterocycle-containing aromatic polyamide fibers of the invention can be favorably used, for example, in fields including protective equipment, such as a helmet, a bulletproof vest and the like, a chassis for an automobile, a ship and the like, an electric insulating material, such as a printed circuit board and the like, and other various fields.

A reverse osmosis composite membrane that has a high salt rejection, a high water permeability, and a high fouling tolerance, and permits practical desalination at a relatively low pressure is provided by coating the surface of a reverse osmosis membrane of aromatic polyamide with polyvinyl alcohol (PVA), for example, and controlling the surface zeta potential of the separation layer within±10 mV at pH 6. This reverse osmosis composite membrane is electrically neutral and controls the electrical adsorption of membrane-fouling substances having a charge group present in water. Therefore, a high separation property can be maintained without fouling the membrane even if water containing a surfactant or a transition metal component is supplied as raw water.

Armor apparatus comprising a non-oxide ceramic element bounded to an aramid fiber composite baking. A special ceramic and a novel aramid fiber substrate are combined in a unique arrangement that permits a single armor system to provide protection against multiple types of ballistic attack. The armor apparatus may be used alone or as a supplementary armor system to provide increased protection from ballistic attack.

A golf ball including an improved mantle composition which results in improved performance characteristics. The composition includes a soft, flexible resin, such as an elastomer, and a quantity of at least one hardness-enhancing material, such as a quantity of fibers or fiber segments, such as glass, carbon, aramid, and/or metallic fibers, and, optionally, at least one ionomer. The hardness-enhancing material can constitute about 1 to about 30 wt % of the intermediate layer. The composition of the intermediate layer enables the golf ball to maintain initial speed and distance of known golf balls, while improving upon spin rate and playability. Alternatively, spin rate and playability can be maintained, while improving upon the initial speed and distance.

A self-lubricating coating is provided which includes a mixture of a curable acrylate composition including a dipentaerythritol pentaacylate and a solid lubricant, such as polytetraflourethylenr. The curable acrylate composition may also include triethylene glycol dimethacrylate. An aramid pulp may also be added to the coating mixture. Also disclosed is a method of manufacturing the coating, and a self-lubricating bearing having the coating disposed on its surface.

Protective clothing for protection against puncture injuries is constructed from more than one layer of a fabric coated with hard solids. The hard solids are applied in accordance with abrasives technology. This protective clothing offers equally good protection against both knife- and needle-like puncture implements. For clothing intended to protect against puncture and projectile injuries, a package of 2-20 layers of a fabric coated with hard solids is combined with a package of 6-50 layers of an uncoated aramid woven fabric.

The present invention relates to reinforced polyamide molding compounds containing high-melting partially aromatic polyamides and flat glass fibers, in particular with a rectangular cross section, i.e., glass fibers with a noncircular cross-sectional area and a dimension ratio of the main cross-sectional axis to the secondary cross-sectional axis of 2 to 6, in particular 3 to 6, most especially preferably from 3.5 to 5.0. The present invention also relates to a method for manufacturing polyamide molding compounds and molded articles manufactured therefrom, i.e., in particular injection-molded parts. The inventive molded parts have a high transverse stiffness and transverse strength.

An intimate blend of staple fibers has from 10 to 75 parts by weight of at least one aramid staple fiber, from 15 to 80 parts by weight of at least one flame retardant cellulosic staple fiber, and from 5 to 30 parts by weight of at least one polyamide staple fiber. The intimate blend of staple fibers provides yarns and fabrics that are flame retardant, also referred to as fire resistant, and can be used to make flame retardant articles, such as clothing. The flame retardant fabrics may have a basis weight from 4 to 15 ounces per square yard.

A wiring board has a base insulating film. The base insulating film has a thickness of 20 to 100 μm and is made of a heat-resistant resin which has a glass-transition temperature of 150° C. or higher and which contains reinforcing fibers made of glass or aramid. The base insulating film has the following physical properties (1) to (6) when an elastic modulus at a temperature of T° C. is given as D_T (GPa) and a breaking strength at a temperature of T° C. is given as H_T (MPa). (1) A coefficient of thermal expansion in the direction of thickness thereof is 90 ppm/K or less.

• (2) D₂₃≧5
• (3) D₁₅₀≧2.5
• (4) (D_-65/D₁₅₀)≦3.0
• (5) H₂₃≧140
• (6) (H_-65/H₁₅₀)≦2.3

An intimate blend of staple fibers has from 10 to 75 parts by weight of at least one aramid staple fiber, from 15 to 80 parts by weight of at least one modacrylic staple fiber, and from 5 to 30 parts by weight of at least one polyamide staple fiber. The intimate blend of staple fibers provides yarns and fabrics that are flame retardant, also referred to as fire resistant, and can be used to make flame retardant articles, such as clothing. The flame retardant fabrics may have a basis weight from 4 to 15 ounces per square yard.

A method for combining three different means of constructing the concentric layers of the outer collecting wall for industrial size centrifuges, whereby treating the inward-facing elements of easily cast or stamped materials using processes such as Physical Vapor Deposition, Chemical Vapor Deposition or metal plating, transforms them into an innermost member with superior hardness and durability, and whereby said wear surface member or deposited layer is physically supported by a middle composite layer made up of one or more investment castings designed to optimally transfer centrifugally-induced compression loads from the innermost wear surface toward the outer surface of the composite wall, such castings being of ceramic, metals or other materials, and whereby the outer surface of said composite wall is comprised of a filament-wound hoop strength reinforcement layer, using aramid, graphic, carbon or such fibers mixed and embedded in resin, such that all highly desirable characteristics for a centrifuge outer, heavies-collecting wall are provided, including interior hardness and wear abrasion, incompressibility and intrinsic dynamic balance, and substantially higher hoop or bursting strength, than can be attained through any metal-crafted centrifuge outer wall, and, model for model, for substantially lower design and fabrication costs.

A power transmission belt incorporating an adhesive treatment system and method for bonding fiber to rubber which includes an optional primer coat based on a low-molecular-weight isocyanate, followed by an overcoat including: (a) a prepolymer based on an isocyanate-terminated diene oligomer, and optionally (b) a low-molecular-weight isocyanate, and/or (c) a thermoplastic urethane comprising the reaction product of the same prepolymer with MDI and EHD. A polyester, aramid, or carbon fiber tensile cord for rubber reinforcement may be treated with the primer coat and the overcoat. A power transmission belt or other dynamic rubber product having ethylene-alpha-olefin elastomer as the primary rubber constituent may be reinforced by the tensile cord.

A side impact protection system for a motor vehicle body having a stowed position and a deployed position, the system includes a first L-shaped rigid structure comprising a first portion and a second portion; a second L-shaped rigid structure comprising a first portion and a second portion; a synthetic cable fixedly attached to the second portions of the first and second L-shaped rigid structures, wherein the synthetic cable is made from a plurality of helically braided bundles of fibers selected from a group consisting of aramid fibers and liquid crystal polymer fibers characterized by strain-at-failure exceeding about 3 percent; and a deployment device in operative communication with the first portions of the first and second L-shaped rigid structures to selectively extend the first portion outwardly from the deployment device, and wherein in a stowed position the second portions are at about the same plane and in a deployed position the second portions are parallel and the synthetic cables form a web-like structure. Processes for suppressing intrusion into a passenger compartment of a motor vehicle body by an object laterally impacting the vehicle body are also described.

A flexible hose comprising a tube, a knit fabric, and a cover. The knit fabric comprises a hybrid yarn which comprises a first yarn of co-para-aramid fibers and a second yarn of meta-aramid fibers. The hose exhibits significantly improved burst pressure and/or improved impulse fatigue resistance.

Combining good metal chassis and good synthetic resin structures, achieving mass production with high productivity, and enabling free design of shapes and structures, are all important considerations in electronic devices, household electric appliances and the like. Moreover, the need for components that are useful in reducing the weight and increasing the strength of various parts and structures is not restricted to electronic devices and household electric appliances. The surface of an aluminum alloy shaped product is covered with ultrafine recesses by being dipped in an eroding aqueous solution, or has formed thereon a metal oxide layer covered with the openings of ultrafine pores by anodizing. On the resin side, there is prepared a polyamide resin compounded with an impact resistance modifier, a mixture of an aliphatic polyamide and an aromatic polyamide, or a mixture of aromatic polyamides. The aluminum alloy shaped product is inserted into an injection mold, and a polyamide-type resin composition is injected onto the surface of the aluminum alloy shaped product, to manufacture an integrated composite.

A high strength abrasion resistant surgical suture material with improved tie down characteristics and tissue compliance with braided yarns formed of ether-ketone variant. The suture features a multifilament jacket formed of braided yarns of ether-ketone variant, optionally braided with yarns of polyester, silk, nylon, ultrahigh molecular weight polyethylene or aramid fibers. The braided jacket surrounds a core formed of twisted yarns of ether-ketone variant or ultrahigh molecular weight polyethylene. The suture has exceptional strength, is ideally suited for most orthopedic procedures, and can be attached to a suture anchor or a curved needle.