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US 12,533,834 B2Granted
Methods for forming foamed beads including a nanostructured fluoropolymer
AssigneeShpp Global Technologies B.V.
InventorsJohannes Gerardus Petrus Goossens, Vaidyanath Ramakrishnan, Johannes Martinus Dina Goossens
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Abstract
A method for forming foamed beads includes: saturating pellets with a blowing agent to form saturated pellets; and depressurizing the saturated pellets in a pressure vessel to form the foamed beads. The pellets include: a matrix polymer component, and from 0.01 wt % to 2 wt %, based on the weight of the pellets, of a nanostructured fluoropolymer, a nanostructured fluoropolymer encapsulated by an encapsulating polymer, or a combination thereof.
Claims8
A method for forming foamed beads, comprising:
- saturating pellets with a blowing agent to form saturated pellets, the pellets comprising a matrix polymer component comprising polyetherimide (PEI), poly(p-phenylene oxide) (PPO), or a combination thereof, and
- from 0.01 wt % to 0.05 wt %, based on the weight of the pellets, of a nanostructured polytetrafluoroethylene;
- and
- depressurizing the saturated pellets in a pressure vessel to form the foamed beads,
- wherein the nanostructured polytetrafluoroethylene has one dimension that is equal to or less than 1000 nanometers (nm),
- wherein the foamed beads have a transparent granulate appearance, and
- when the foamed beads include chunks or do not include chunks.
4 more elements
Dependencies are inferred from the claim text.