Static-dissipative foam extrusion calibration with minimized expansion loss
AssigneeSabic Global Technologies B.V.
InventorCraig Wojcicki
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Abstract
The disclosure relates to a calibrator including a first plate opposing a second plate, the first plate having a first foam-expansion surface adjacent to a first anti-static surface, the second plate having a second foam-expansion surface adjacent to a second anti-static surface, wherein the first foam-expansion surface and the second foam-expansion surface are aligned to form a foam-expansion region, and wherein the first anti-static surface and the second anti-static surface are aligned to form an anti-static region. The disclosure also relates to a method of producing a polyetherimide foam, the method including passing a liquid polymer mixture comprising a polyetherimide through the calibrator.
Claims16
A calibrator comprising a first plate opposed to a second plate, the first plate comprising:
- a first foam-expansion surface adjacent to
- a first anti-static surface,
- wherein the first foam-expansion surface comprises an unfilled fluoropolymer,
- wherein the first anti-static surface comprises a carbon-filled fluoropolymer,
- wherein the calibrator further comprises a first end proximal to a foam extrusion die and a second end distal to the foam extrusion die, wherein the first foam expansion surface is positioned at the first end and the first anti-static surface is positioned at the second end.
A calibrator comprising a first plate opposing a second plate,
- the first plate comprising
- a first foam-expansion surface adjacent to
- a first anti-static surface,
- the second plate having
- a second foam-expansion surface adjacent to
- a second anti-static surface,
- wherein the first foam-expansion surface comprises an unfilled fluoropolymer,
- wherein the first anti-static surface comprises a carbon-filled fluoropolymer
- wherein the first foam-expansion surface and the second foam-expansion surface are aligned to form a foam-expansion region,
- wherein the first anti-static surface and the second anti-static surface are aligned to form an anti-static region, and
- wherein the calibrator comprises a first end proximal to a foam extrusion die and a second end distal to the foam extrusion die,
- wherein the foam-expansion region is positioned at the first end,
- wherein the anti-static region is positioned at the second end.
Dependencies are inferred from the claim text.