Electrospinning of PTFE with high viscosity materials
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United States of America Patent
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May 15, 2012
Grant Date -
Aug 5, 2010
app pub date -
Jan 19, 2010
filing date -
Jan 16, 2009
priority date (Note) -
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Abstract
An improved process for forming a PTFE mat is described. The process includes providing a dispersion with PTFE, a fiberizing polymer and a solvent wherein said dispersion has a viscosity of at least 50,000 cP. An apparatus is provided which comprises a charge source and a target a distance from the charge source. A voltage source is provided which creates a first charge at the charge source and an opposing charge at the target. The dispersion is electrostatically charged by contact with the charge source. The electrostatically charged dispersion is collected on the target to form a mat precursor which is heated to remove the solvent and the fiberizing polymer thereby forming the PTFE mat.
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