摘要:
High levels of inorganic filler, processing fluid and silicone polymer are compounded and devolatilized into homogeneous filled compositions with requisite reinforcing properties and levels of volatiles. In the method, a filler, processing fluid and silicone polymer are mixed in a first compounding apparatus (12,44,76) to produce a dispersed composition containing volatiles. The dispersed composition is then compounded in a long extruder (14,46,78) having an L/D ratio of greater than 50 to devolatilize the dispersed composition.
摘要:
A synthetic jet driven cooling device 50 includes at least one synthetic jet actuator 10 to generate and project a series of fluid vortices. A manifold 54 coupled to the synthetic jet actuator(s) 10 receives the fluid vortices and generates a primary air stream. An air amplifier (58) connected to the manifold (54) by a connecting pipe 56 receives the primary air stream. The air amplifier 54 includes an air intake 64 oriented perpendicular to the connecting pipe 56 and an air outlet 66 positioned opposite the air intake 64, with a venturi section 62 positioned between the air intake 64 and air outlet 66 that has a diameter smaller than the air intake diameter. A low pressure region in a center of the venturi section 62 entrains a surrounding air in through the air intake 64 to generate a secondary air stream that combines with the primary air stream to generate a combined air flow that flows through the venturi 62 and exits the air outlet 66.
摘要:
A method and system are provided that efficiently compound high levels of inorganic filler, processing fluid and silicone polymer at a commercial rate into homogeneous filled and devolatilized silicone compositions. In the method, filled silicone compositions are compounded by compounding a filler, processing fluid and silicone polymer in a first compounding apparatus to produce a first dispersed composition and simultaneously compounding a filler, processing fluid and silicone polymer in a second compounding apparatus that shares a common extruder shaft with the first compounding apparatus to produce a second dispersed composition. The system comprises a first compounding apparatus and a sequential second compounding apparatus that shares a common shaft with the first compounding apparatus. An extruder transition section of the system includes an enclosed discharge chamber defined by a first sectioning wall, a second sectioning wall and a contoured lower wall that transitions toward a discharge port and a shaft extends through the first sectioning wall, traverses the chamber and extends through the second sectioning wall.
摘要:
High levels of inorganic filler, processing fluid and silicone polymer are compounded and devolatilized into homogeneous filled compositions with requisite reinforcing properties and levels of volatiles. In the method, a filler, processing fluid and silicone polymer are mixed in a first compounding apparatus (12,44,76) to produce a dispersed composition containing volatiles. The dispersed composition is then compounded in a long extruder (14,46,78) having an L/D ratio of greater than 50 to devolatilize the dispersed composition.
摘要:
Non-delaminating resinous compositions are prepared by blending at least one polyetherimide, at least one liquid crystalline polyester in an amount to provide lower melt viscosity, and a compatibilizing amount of at least one polyepoxy compound. The compositions may also contain a minor proportion of at least one non-liquid crystalline polyester such as poly(ethylene terephthalate) or poly(ethylene 2,6-naphthalenedicarboxylate).
摘要:
A synthetic jet driven cooling device 50 includes at least one synthetic jet actuator 10 to generate and project a series of fluid vortices. A manifold 54 coupled to the synthetic jet actuator(s) 10 receives the fluid vortices and generates a primary air stream. An air amplifier (58) connected to the manifold (54) by a connecting pipe 56 receives the primary air stream. The air amplifier 54 includes an air intake 64 oriented perpendicular to the connecting pipe 56 and an air outlet 66 positioned opposite the air intake 64, with a venturi section 62 positioned between the air intake 64 and air outlet 66 that has a diameter smaller than the air intake diameter. A low pressure region in a center of the venturi section 62 entrains a surrounding air in through the air intake 64 to generate a secondary air stream that combines with the primary air stream to generate a combined air flow that flows through the venturi 62 and exits the air outlet 66.
摘要:
The present invention involves blends of polycarbonate resin with rubber grafted terpolymer resin, one or more styrenic rigid coplymers wherein a small amount of an aliphatic C 4 to C 16 polyalpha olefin homopolymer or copolymer or its functionalized derivatives is included in the blend.