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: The present invention relates to a composition of tetrafluoroethylene/perfluoro(ethyl vinyl ether) copolymer particles and metal powder which enables the composition to the used for rotolining an interior surface of a hollow article, wherein the resultant lining adheres to such surface. The invention further relates to oil pipe having its interior surface rotolined with fluoropolymer, the rotolining containing an effective amount of metal powder to cause the rotolining to adhere to said interior surface and a process for rotolinig the interior of the oil pipe.

Abstract: The present invention relates to a composition of tetrafluoroethylene/perfluoro(ethyl vinyl ether) copolymer particles and metal powder which enables the composition to the used for rotolining an interior surface of a hollow article, wherein the resultant lining adheres to such surface. The invention further relates to oil pipe having its interior surface rotolined with fluoropolymer, the rotolining containing an effective amount of metal powder to cause the rotolining to adhere to said interior surface and a process for rotolining the interior of the oil pipe.

Abstract: A molding process is provided for a composition comprising fiber, such as glass, aramid, PTFE fiber, or carbon fiber, and melt-fabricable fluoropolymer, wherein the decrease in melt flowability of the composition as arises when the composition is provided to the process as conventional size melt-formed pellets is minimized by providing the composition to the process in the form melt-formed particles, at least 80 wt % of these particles having a width no greater than about 70 mils (1784 micrometers).

Abstract: The present invention relates to a composition of tetrafluoroethylene/perfluoro(ethyl vinyl ether) copolymer particles and metal powder which enables the composition to the used for rotolining an interior surface of a hollow article, wherein the resultant lining adheres to such surface. The invention further relates to oil pipe having its interior surface rotolined with fluoropolymer, the rotolining containing an effective amount of metal powder to cause the rotolining to adhere to said interior surface and a process for rotolining the interior of the oil pipe.

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 composition of tetrafluoroethylene/perfluoro(ethyl vinyl ether) copolymer particles and metal powder which enables the composition to the used for rotolining an interior surface of a hollow article, wherein the resultant lining adheres to such surface. The invention further relates to oil pipe having its interior surface rotolined with fluoropolymer, the rotolining containing an effective amount of metal powder to cause the rotolining to adhere to said interior surface and a process for rotolinig the interior of the oil pipe.

Abstract: The present invention relates to a composition of tetrafluoroethylene/perfluoro(ethyl vinyl ether) copolymer particles and metal powder which enables the composition to the used for rotolining an interior surface of a hollow article, wherein the resultant lining adheres to such surface.

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 process for rotomolding using novel melt-extruded melt-fabricable TFE copolymer minicubes, wherein at least 80% of the minicubes are in the size range of 200 to 1200 &mgr;m.

Abstract: Melt fabricable compositions of at least 50 wt % polytetrafluoroethylene are provided, wherein the composition contains polyaryletherketone and optionally part of the polytetrafluoroethylene is PTFE micropowder.

Abstract: A process for rotomolding using novel melt-extruded melt-fabricable TFE copolymer minicubes, wherein at least 80% of the minicubes are in the size range of 200 to 1200 &mgr;m.

Abstract: Melt fabricable compositions of at least 50 wt % polytetrafluoroethylene are provided, wherein the composition contains polyaryletherketone and optionally part of the polytetrafluoroethylene is PTFE micropowder.

Abstract: Melt fabricable compositions of at least 50 wt % polytetrafluoroethylene are provided, wherein the composition contains polyaryletherketone and optionally part of the polytetrafluoroethylene is PTFE micropowder.

Abstract: Compositions of melt-flowable fluoroplastic and poly(ether ketone ketone) are provided, wherein the either the fluoroplastic or the poly(ether ketone ketone) is the matrix polymer and the other polymer is the dispersed phase, to provide improved properties to the matrix polymer.

Abstract: Low melt viscosity polytetrafluorethylene (PTFE), i.e. having a melt viscosity of 50 to 1.times.10.sup.5 Pa.multidot.s at 372.degree. C., is combined with non-fluorinated thermally stable polymer such as polyarleneetherketone to provide melt-fabricability application for the low MV PTFE and provide improved properties for the thermally stable polymer.

Abstract: Certain polyester-based polyurethaneureas in solutions of organic solvent at a 12 to 20% concentration are particularly suited for use in a mandrel-dipping process for producing thin-walled elastic articles, such as surgical gloves, which are more resistant to puncture and tear than conventional surgical gloves made from rubber latex.

Abstract: Certain polyether-based or polyester-based polyurethaneureas in solutions of organic solvent at a 12 to 20% concentration are particularly suited for use in a mandrel-dipping process for producing thin-walled elastic articles, such as surgical gloves, which are more resistant to puncture and tear than conventional surgical gloves made from rubber latex.

Abstract: Brittle fibers such as ceramic or carbon fibers are protected by a shroud of thermoplastic material surrounding the core. Such enshrouded yarns facilitate formation of fiber preforms used in the preparation of composite materials.

Abstract: High modulus, high tenacity fibers of poly-p-phenylene terephthalamide (PPD-T) are disclosed along with a fiber heat treating process for increasing the inherent viscosity and the crystallinity index of the PPD-T. Never-dried fibers swollen with water of controlled acidity are heated beyond dryness.