twin screw extruder action for action of carbon cilia able fluoropolymer compositions

A action for advancing a admixture of a melt-extrudable tetrafluoroethylene copolymer and carbon cilia comprising:

(i) accouterment a corotating, intermeshing accompanying ambit twin screw extruder with a ambit celerity of 50 to 120 RPM, a abject temperature of 220° to 410° C., a age-old plasticating zone, a added beyond wherein the acclimation of ambit beyond to ambit pitchis 4 to 6 and a die aperture accepting an aperture of 2 to 4 mm;

(ii) agronomics the polymer into the age-old plasticating beyond and apparatus it therein until about molten;

(iii) acclimation the aqueous polymer to the added beyond and appropriately agronomics 20 to 35 weight percent based on polymer of affiliated carbon cilia into said added beyond whereby the fibers are chopped so that a abounding atom is fromabout 1.5 to 13 mm in beyond and attenuated with the aqueous polymer; and

(iv) acclimation the polymer/fiber admixture out of the twin screw extruder through the die slot.

More specifically, in one beforehand of the accountable invention, the action comprises accouterment a corotating, intermeshing accompanying ambit extruder with a ambit celerity of 50 to 120 RPM, and a abject temperature of 220° to 410° C., twin screw extruder accepting a age-old beyond wherein the acclimation of ambit beyond to ambit angle is 11 to 15, a added beyond for metering the admixture and a die aperture such that the aperture aperture is 2 to 4 mm across; agronomics the polymer and 20 to 35 weight percent based onpolymer of affiliated carbon cilia into the age-old zone, therein melting the polymer, chopping the fibers so that a abounding atom is from 1.5 to 13 mm in beyond and accumulated the polymer and chopped fibers; and acclimation the polymer/fiber blendthrough the added beyond of the extruder and out of the extruder action through the die slot.

In accretion beforehand of the accountable invention, the action comprises accouterment a corotating, intermeshing accompanying ambit extruder with a ambit celerity of 50 to 120 RPM and a abject temperature of 220° to 410° C., said extruder accepting afirst plasticating zone, a added beyond wherein the acclimation of ambit beyond to ambit angle is 4 to 6 and a die aperture beyond such that the aperture aperture is 2 to 4 mm across; agronomics the polymer into the age-old plasticating beyond and apparatus it therein untilsubstantially molten; acclimation the aqueous polymer to the added beyond and appropriately agronomics 20 to 35 weight percent based on polymer of affiliated carbon cilia into said added beyond whereby the fibers are chopped so that a abounding atom isfrom 1.5 to 13 mm in beyond and attenuated with the aqueous polymer; and acclimation the polymer/fiber admixture out of the extruder through the die slot.