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US 7,008,989 B2Granted
Abrasion-resistant polytetrafluoroethylene tape
AssigneeColtec Industrial Products LLC
InventorsPaul E. Sarkis, David Delgado
Life of this patent
Estimating the term…
Abstract
An abrasion resistant, laser-markable, tape comprising milled virgin polyphenylene sulfide resin, polytetrafluoroethylene and titanium dioxide, and optionally poly-p-oxybenzoate.
Claims43
A fluoropolymer-based tape comprising:
- (a) a fluoropolymer;
- (b) about 1 to about 6 percent by weight, based on the weight of the fluoropolymer, of virgin, unsintered, polyphenylene sulfide resin, wherein the polyphenylene sulfide resin has an average particle size of less than about 25 microns;
- (c) about 1 to about 3 percent by weight, based on the weight of the fluoropolymer, of a poly-p-oxybenzoate.
A fluoropolymer-based tape comprising:
- (a) a fluoropolymer;
- (b) about 1 to about 6 percent by weight, based on the weight of the fluoropolymer, of virgin, unsintered, polyphenylene sulfide resin, wherein the polyphenylene sulfide resin has an average particle size of less than about 25 microns;
- (c) from about 0.5 to 1.5 percent by weight of a poly-p-oxybenzoate.
A method for producing a material useful for electrical cables and insulated conductors said process including the steps of:
- (a) selecting a particulate polyphenylene sulfide having a mean particle size of about 1 to about 20 microns;
- (b) selecting a particulate photosensitive material having a mean particle size less than 3 microns;
- (c) mixing the particulate polyphenylene sulfide and photosensitive material with a fine powder paste extrudable polytetrafluoroethylene resin;
- (d) air milling the mixture produced in step (c) to produce a uniform dispersion of said polyphenylene sulfide, said photosensitive material, and said polytetrafluoroethylene resin;
- (e) blending the uniform dispersion produced in step (d) with an extrusion aid comprising a hydrocarbon solvent to produce a blend having a composition of about 2 to about 9 percent by weight, based on the weight of the polytetrafluoroethylene resin, of the photosensitive material, about 1 to about 6 percent by weight, based on the weight of the polytetrafluoroethylene resin, of said polyphenylene sulfide, about 8 to about 23% by weight, based on the weight of the polytetrafluoroethylene resin, extrusion aid, and the balance polytetrafluoroethylene resin;
- (f) forming the blend of step (e) into a preform suitable for paste extrusion;
- and
- (g) paste extruding said preform directly onto an electrical conductor to produce a uniformly photosensitive material:polyphenylene sulfide filled polytetrafluoroethylene resin material having a selected configuration.
5 more elements
A method for producing a material useful for electrical cables and insulated conductors said process including the steps of:
- (a) selecting a particulate polyphenylene sulfide having a mean particle size of about 1 to about 20 microns;
- (b) selecting a particulate photosensitive material having a mean particle size greater than 3 microns;
- (c) selecting poly-p-oxybenzoate;
- (d) mixing the particulate polyphenylene sulfide and photosensitive material and poly-p-oxybenzoate with a fine powder paste extrudable polytetrafluoroethylene resin;
- (e) air milling the mixture produced in step (d) to produce a uniform dispersion of said polyphenylene sulfide, said photosensitive material, and said polytetrafluoroethylene resin;
- (f) blending the uniform dispersion produced in step (e) with an extrusion aid comprising a hydrocarbon solvent to produce a blend having a composition of about 2 to about 9 percent by weight, based on the weight of the polytetrafluoroethylene resin, of the photosensitive material, about 1 to about 6 percent by weight, based on the weight of the polytetrafluoroethylene resin, of said polyphenylene sulfide, about 8 to about 23% by weight, based on the weight of the polytetrafluoroethylene resin, extrusion aid, from about 1 to about 3% poly-p-oxybenzoate, and the balance polytetrafluoroethylene resin;
- (g) forming the blend of step (f) into a preform suitable for paste extrusion;
- and
- (h) paste extruding said preform to produce a uniformly photosensitive material:polyphenylene sulfide filled polytetrafluoroethylene resin material having a selected configuration.
6 more elements
Dependencies are inferred from the claim text.