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US 12,091,783 B2Granted
Stretched aromatic polyethers
AssigneeEvonik Operations GmbH
InventorsLan de Gans Li, Martin Wielpütz, Markus Hartmann, Dirk Heinrich Bücker
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Abstract
Stretched filaments based on aromatic polyethers, wherein the filaments have been stretched at a temperature between glass transition temperature and melting point and wherein the filaments are cooled down to below the glass transition temperature under full tensile load and a process for production thereof and use thereof.
Claims18
A stretched filament having a stretch factor greater than or equal to 5, comprising at least 80% by weight of aromatic polyethers,
- wherein the filament has been stretched at a temperature between glass transition temperature and melting point and wherein the filament has been cooled down to below the glass transition temperature under full load,
- wherein the aromatic polyethers consists of polyetheretherketone (PEEK).
Dependencies are inferred from the claim text.