Abstract:
L'invention a trait à l'utilisation d'une composition pour réaliser des pièces par enroulement f ilamentaire, ladite composition comprenant: au moins une formulation de résine comprenant au moins une résine thermodurcissable ; au moins un agent de régulateur de rhéologie miscible dans ladite formulation tel : qu'il confère à la composition une différence de viscosité d'un facteur d'au moins 100 entre un état haute température à gradient de cisaillement C 1 et un état basse température à gradient de cisaillement C 2 , la différence de température entre l'état haute température et l'état basse température étant d'au moins 30°C et le gradient de cisaillement C 1 étant supérieur au gradient de cisaillement C 2 ; et que la composition ait un comportement newtonien à l'état haute température.
Abstract translation:本发明涉及组合物用于通过长丝缠绕生产部件的用途,该组合物包括至少一种含有至少一种类型的热固性树脂的树脂配制剂,至少一种类型的可混溶的流变调节剂,其提供组合物的粘度 在C <1>剪切速率的高温状态和C 2/2剪切速率的低温状态下,其因子等于或大于100的差异,其中 高温和低温状态之间的温度差等于或大于30℃,C1剪切速率大于C 2 H 2剪切速率,并且组合物显示牛顿行为 其高温状态。
Abstract:
Mixtures or adducts of N-heterocyclic carbenes with metal amides or metal alkoxides are effective catalysts for the polymerization of macrocyclic polyester oligomers. The catalysts are stable at polymerization temperatures, and the polymerization is rapid, resulting in high monomer conversion, high molecular weight, and a mechanically sound material.
Abstract:
Mixtures or adducts of N-heterocyclic carbenes with metal amides or metal alkoxides are effective catalysts for the polymerization of macrocyclic polyester oligomers. The catalysts are stable at polymerization temperatures, and the polymerization is rapid, resulting in high monomer conversion, high molecular weight, and a mechanically sound material.
Abstract:
Compounds containing a lanthanide rare earth element or yttrium are effective catalysts for the polymerization of macrocyclic polyester oligomers. The catalysts are stable at elevated temperatures, and the polymerization is rapid, resulting in high monomer conversion, high molecular weight, and a mechanically sound material.
Abstract:
A releasable mechanism such as a cap is adapted for use with an access sheath having an elongate tube and a handle structure disposed at a proximal end of the tube. The releasable mechanism is sized and configured to fit the handle structure, which is shaped like the bell of a horn, to further facilitate use with surgical instrumentation. The releasable mechanism may operate as a separate cap that snaps onto the handle structure to provide access pathways to the sheath. The releasable mechanism may also be disposed at a proximal end of a surgical instrument to be introduced into the access sheath such that it may be interlocked with the sheath. In a method of manufacturing a kink-resistant sheath, a wire is initially coated with a plastic material, the coated wire is then wrapped around a mandrel forming a plurality of windings, and the wound coated wire is heated until the plastic material melts and bonds the windings to form a wire-reinforced sheath. The plastic material is preferably polyurethane but may be a thermoplastic, a thermoset or any plastic material having hard and/or soft durometer. The wound coated wire may be heated by capturing the windings within a shrink tube or compressing the windings in a mold and heating the windings until the sheath is formed. In another aspect of the invention, a mandrel is used as part of an extrusion process. In another aspect of the invention, another coating or outside layer could be formed over the spring reinforcement by dipping in a solvent based solution. In yet another embodiment of the invention, a braid such as a polyester braid may be used instead of or in addition to the coil spring to form a kink-resistant sheath.
Abstract:
The present invention provides a unitary run flat tire (RFT) reinforcement (16) that is formed into a relatively rigid shape. The reinforcement is insertable into a mold for an RFT support and can maintain the needed structural rigidity for such insertion. Further, the invention provides an RFT support that is molded and includes the RFT reinforcement. The invention also provides a wheel assembly including a tire, a rim, and an RFT support between the rim and the tire, where the support includes the RFT reinforcement. The RFT support can have a colored indicator (139) formed or subsequently applied thereto to indicate one or more attributes of the support.
Abstract:
The present invention provides a unitary run flat tire (RFT) (16) reinforcement that is formed into a relatively rigid shape. The reinforcement is insertable into a mold for an RFT support and can maintain the needed structural rigidity for such insertion. Further, the invention provides an RFT support that is molded and includes the RFT reinforcement. The invention also provides a wheel assembly including a tire, a rim, and an RFT support between the rim and the tire, where the support includes the RFT reinforcement. The RFT support can have a colored indicator formed or subsequently applied thereto to indicate one or more attributes of the support.
Abstract:
A flexible, polymer, composite tube (1) adapted for transport of fluids such as hydrocarbons, e.g. oil and/or gas, and flexible enough to be coiled with a curvature radius as short as approximately 20 times its outer diameter. The flexible riser (1) comprises the following structural elements: an inner liner (2) of thermoplastic material, an intermediate reinforced, polymer, multi layer component (3), and an outer thermoplastic liner (4). The inner liner (2) is continuously bonded to the intermediate, multi layer component (3), which again is continuously bonded to the outer liner (4). A method for manufacturing the flexible tube (1) by welding or gluing is also described.
Abstract:
An invention is disclosed which relates to a process for producing a glass reinforced potable water pressure pipe having an ultra thin inner layer (5) of thermoplastic resin that is made via a continuous mandrel (3) concept and which is ideally suited for use with potable water.
Abstract:
A method for fabricating a solid rocket motor case includes applying an insulator material around a mandrel, embedding at least two rigid support pieces in the insulator material, wherein the at least two rigid support pieces are axially symmetric about the insulator material, filament winding a case around the insulator, machining access holes through the case to, respectively, each of the at least two rigid support pieces, affixing pivoting hardware to each of the at least two rigid support pieces through the access holes, and uprighting the case via the pivoting hardware.