Abstract: Heat aging of the composition comprising melt-fabricable tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer, the alkyl containing 1 to 5 carbon atoms and melt flowable polytetrafluoroethylene is effective to cause thermal transformation of the composition in the solid state, which is epitaxial co-crystallization of the polymer components of the composition, and other valuable changes, such as increased continuous use temperature.

Abstract: Communications cable is provided for use in downhole wells wherein the cable will be exposed to a temperature of at least 280° C., the cable including as a component thereof a composition comprising melt-fabricable tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer and melt flowable polytetrafluoroethylene, said polytetrafluoroethylene by itself having no tensile property and being present in said composition in an amount effective to enable the component to withstand this temperature, with the high temperature exposure of the cable component being effective to thermally transform the composition in the solid state, thereby obtaining epitaxial co-crystallization.

Abstract: Heat aging of the composition comprising melt-fabricable tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer, the alkyl containing 1 to 5 carbon atoms and melt flowable polytetrafluoroethylene is effective to cause thermal transformation of the composition in the solid state, which is epitaxial co-crystallization of the polymer components of the composition, and other valuable changes, such as increased continuous use temperature.

Abstract: The present invention relates to a preformed liner of tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer adhered to the surface of a pipe, and in particular, an oil well pipe, without the need for either a primer layer or an adhesive. The liner comprises an effective amount of metal powder which provides adhesion between the liner and the surface of the pipe. The present invention also relates to a process for making such pipe, where in a preferred embodiment, the liner is co-extruded to form an inner layer and an outer layer. This co-extrusion embodiment is particularly useful in applications where high purity is necessary. In this case, the inner layer comprises an effective amount of metal powder and the outer layer is pure tetrafluoroethylene/perfluoro (alkyl vinyl ether) copolymer.

Abstract: Heat aging of the composition comprising melt-fabricable tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer, the alkyl containing 1 to 5 carbon atoms and melt flowable polytetrafluoroethylene is effective to cause thermal transformation of the composition in the solid state, which is epitaxial co-crystallization of the polymer components of the composition, and other valuable changes, such as increased continuous use temperature.

Abstract: The present invention relates to a preformed liner of Tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer adhered to the surface of a pipe, and in particular, an oil well pipe, without the need for either a primer layer or an adhesive. The liner comprises an effective amount of metal powder which provides adhesion between the liner and the surface of the pipe. The present invention also relates to a process for making such pipe, where in a preferred embodiment, the liner is co-extruded to form an inner layer and an outer layer. This co-extrusion embodiment is particularly useful in applications where high purity is necessary. In this case, the inner layer comprises an effective amount of metal powder and the outer layer is pure tetrafluoroethylene/ perfluoro(alkyl vinyl ether) copolymer.

Abstract: A process is provided for improving the MIT flex life of tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer, said perfluoroalkyl containing from 1 to 5 carbon atoms, comprising incorporating melt flowable polytetrafluoroethylene into said copolymer and thereafter heat treating the resultant composition at a temperature of at least 280° C., the amount of said polytetrafluoroethylene and said heat treatment being effective to increase the flex life of said composition by at least 2× the flex life of both said copolymer and said composition prior to said heat treatment and to thermally transform the composition in the solid state, which is epitaxial co-crystallization of the polymer components of the composition.

Abstract: The present invention relates to a preformed liner of tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer adhered to the surface of a pipe, and in particular, an oil well pipe, without the need for either a primer layer or an adhesive. The liner comprises an effective amount of metal powder which provides adhesion between the liner and the surface of the pipe. The present invention also relates to a process for making such pipe, where in a preferred embodiment, the liner is co-extruded to form an inner layer and an outer layer. This co-extrusion embodiment is particularly useful in applications where high purity is necessary. In this case, the inner layer comprises an effective amount of metal powder and the outer layer is pure tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer.

Abstract: Creep resistant fluoropolymer is made by blending a melt-fabricable fluoropolymer having a melt flow rate of no greater than about 7 g/10 min with milled carbon fiber and forming the resultant blend into an article, the carbon fiber content of the blend being from about 15 to 35 wt % based on the combined weight of the carbon fiber and the fluoropolymer.

Abstract: Heat aging of the composition comprising melt-fabricable tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer, the alkyl containing 1 to 5 carbon atoms and melt flowable polytetrafluoroethylene is effective to cause thermal transformation of the composition in the solid state, which is epitaxial co-crystallization of the polymer components of the composition, and other valuable changes, such as increased continuous use temperature.

Abstract: A process is provided for improving the MIT flex life of tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer, said perfluoroalkyl containing from 1 to 5 carbon atoms, comprising incorporating melt flowable polytetrafluoroethylene into said copolymer and thereafter heat treating the resultant composition at a temperature of at least 280° C., the amount of said polytetrafluoroethylene and said heat treatment being effective to increase the flex life of said composition by at least 2× the flex life of both said copolymer and said composition prior to said heat treatment and to thermally transform the composition in the solid state, which is epitaxial co-crystallization of the polymer components of the composition.

Abstract: Communications cable is provided for use in downhole wells wherein the cable will be exposed to a temperature of at least 280° C., the cable including as a component thereof a composition comprising melt-fabricable tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer and melt flowable polytetrafluoroethylene, said polytetrafluoroethylene by itself having no tensile property and being present in said composition in an amount effective to enable the component to withstand this temperature, with the high temperature exposure of the cable component being effective to thermally transform the composition in the solid state, thereby obtaining epitaxial co-crystallization.

Abstract: The present invention relates to a preformed liner of tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer adhered to the surface of a pipe, and in particular, an oil well pipe, without the need for either a primer layer or an adhesive. The liner comprises an effective amount of metal powder which provides adhesion between the liner and the surface of the pipe. The present invention also relates to a process for making such pipe, where in a preferred embodiment, the liner is co-extruded to form an inner layer and an outer layer. This co-extrusion embodiment is particularly useful in applications where high purity is necessary. In this case, the inner layer comprises an effective amount of metal powder and the outer layer is pure tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer.

Abstract: The present invention relates to a preformed liner of tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer adhered to the surface of a pipe, and in particular, an oil well pipe, without the need for either a primer layer or an adhesive. The liner comprises an effective amount of metal powder which provides adhesion between the liner and the surface of the pipe. The present invention also relates to a process for making such pipe, where in a preferred embodiment, the liner is co-extruded to form an inner layer and an outer layer. This co-extrusion embodiment is particularly useful in applications where high purity is necessary. In this case, the inner layer comprises an effective amount of metal powder and the outer layer is pure tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer.

Abstract: The present invention relates to a preformed liner of tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer adhered to the surface of a pipe, and in particular, an oil well pipe, without the need for either a primer layer or an adhesive. The liner comprises an effective amount of metal powder which provides adhesion between the liner and the surface of the pipe. The present invention also relates to a process for making such pipe, where in a preferred embodiment, the liner is co-extruded to form an inner layer and an outer layer. This co-extrusion embodiment is particularly useful in applications where high purity is necessary. In this case, the inner layer comprises an effective amount of metal powder and the outer layer is pure tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer.

Abstract: The present invention relates to a preformed liner of tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer adhered to the surface of a pipe, and in particular, an oil well pipe, without the need for either a primer layer or an adhesive. The liner comprises an effective amount of metal powder which provides adhesion between the liner and the surface of the pipe. The present invention also relates to a process for making such pipe, where in a preferred embodiment, the liner is co-extruded to form an inner layer and an outer layer. This co-extrusion embodiment is particularly useful in applications where high purity is necessary. In this case, the inner layer comprises an effective amount of metal powder and the outer layer is pure tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer.

Abstract: A composition of tetrafluoroethylene/perfluoro(ethyl vinyl ether) copolymer particles and metal powder is disclosed that enables the composition to be used for adhering a lining to an interior surface of a hollow article.

Abstract: A process is provided for rotolining the interior surface of an oil pipe having an inner diameter of at least 2 in (5.1 cm) and no greater than 6 in (15.2 cm) and length of at least 10 ft (3 m), comprising introducing particles of rotolining composition comprising fluoropolymer and no greater than 2 wt % of metal powder into the interior of said pipe, heating the pipe to a temperature above the melting temperature of the fluoropolymer, rotating the pipe around its longitudinal axis during the heating and rocking the pipe end-to-end thereof during the rotating so as to distribute the composition over the entire interior of the pipe, the combination of heating and distributing causing the particles to melt and coalesce to form a rotolining on the pipe over its entire interior.

Abstract: The present invention relates to (a) the rotolining of the interior surface of a hollow article with tetrafluoroethylene/perfluoro(alkyl vinyl ether copolymer in a multicoat system, in which the undercoat also contains a powder additive, and the overcoat is preferably stabilized copolymer to form a bubble-free coating thicker than the undercoat, (b) embodiments in which the undercoat is stabilized or unstabilized copolymer, (c) use of the undercoat as a single coat system, (d) the composition for forming a bubble-free coating that adheres to the surface, arising from the presence of adhesion-promoting, non-bubble promoting metal powder being present in the composition.

Abstract: A light-emitting diode housing comprising fluoropolymer is disclosed. The light-emitting diode housing supports a light-emitting diode chip and reflects at least a portion of the light emitted from the light-emitting diode chip.