Method of producing powder coating material
AssigneeAGC Inc.
InventorsLei Luo, Zhehong Wang, Ken Iruya
Life of this patent
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Abstract
The present invention relates to a method of producing a powder coating material containing a fluororesin and a non-fluororesin. The method of producing a powder coating material includes kneading a raw material containing the fluororesin and the non-fluororesin with a kneading extruder equipped with a screw having a kneading zone, wherein a ratio of a length LK of the kneading zone to an effective length LS of the screw (LK/LS×100) is 21.0 to 50.0%.
Claims18
A method of producing a powder coating material containing a fluororesin and a non-fluororesin, the method comprising:
- kneading a raw material containing the fluororesin and the non-fluororesin with a kneading extruder equipped with at least one screw having a kneading zone,
- wherein
- a ratio of a length LK of the kneading zone to an effective length LS of the screw (LK/LS×100) is 21.0 to 50.0%,
- a value of a ratio of the effective length LS of the screw to an outer diameter DS of the screw (LS/DS) is 10 to 30,
- the kneading zone includes a neutral zone equipped with at least one neutral kneading segment, and
- a ratio of a length LN of the neutral zone to the length LK of the kneading zone (LN/LK×100) is 30% or more.
A method of producing a powder coating material containing a fluororesin and a non-fluororesin, the method comprising:
- kneading a raw material containing the fluororesin and the non-fluororesin with a kneading extruder equipped with at least one screw having a kneading zone and a metering zone downstream of the kneading zone, wherein the screw is rotated at a rotational speed of 100 to 1,000 rpm, a ratio of a length LK of the kneading zone to an effective length Ls of the screw (LK/Ls×100) is 21.0 to 50.0%, and a value of a ratio of the effective length Ls of the screw to an outer diameter Ds of the screw (Ls/Ds) is 10 to 30.
A method of producing a powder coating material containing a fluororesin and a non-fluororesin, the method comprising:
- kneading a raw material containing the fluororesin and the non-fluororesin with a kneading extruder equipped with at least one screw having a kneading zone,
- wherein
- the screw is rotated at a rotational speed of 100 to 1,000 rpm,
- a ratio of a length LK of the kneading zone to an effective length LS of the screw (LK/LS×100) is 21.0 to 50.0%,
- the kneading zone includes a neutral zone equipped with at least one neutral kneading segment, and
- a ratio of a length LN of the neutral zone to the length LK of the kneading zone (LN/LK×100) is 30% or more.
Dependencies are inferred from the claim text.