Nonwoven material for low friction bearing surfaces
AssigneeE. I. Du Pont de Nemours and Company
InventorsJaime A. Ampuero Auza, Mikhail R. Levit, Arthur R. Nelson
Life of this patent
Estimating the term…
Abstract
The present invention relates to a saturable nonwoven material comprising fluoropolymer floc and aramid floc, which can be used as a substrate for a liner for self-lubricating bearings and for other applications.
Claims4
A prepreg comprising a matrix resin and a saturable nonwoven material comprising a resin impregnatable structure including a mixture dispersed therein of at least one fluoropolymer floc;
- at least one wettable structural organic floc;
- and a binder wherein the binder is up to about 20% by weight of the saturable nonwoven material;
- and wherein the material has a basis weight of about 17 g/m2 to about 810 g/m2 and a thickness of about 0.02 mm to about 8.2 mm.
A self-lubricating bearing comprising a saturable nonwoven material comprising a resin impregnatable structure including a mixture dispersed therein of at least one fluoropolymer floc;
- at least one wettable structural organic floc;
- and a binder wherein the binder is up to about 20% by weight of the saturable nonwoven material;
- and wherein the material has a basis weight of about 17 g/m2 to about 810 g/m2 and a thickness of about 0.02 mm to about 8.2 mm.
A process for making a saturable nonwoven material comprising a resin impregnatable structure including a mixture dispersed therein of a least one fluoropolymer floc;
- at least one wettable structural organic floc;
- and a binder wherein the binder is up to about 20% by weight of the saturable nonwoven material;
- and wherein the material has a basis weight of about 17 g/m2 to about 810 g/m2 and a thickness of about 0.02 mm to about 8.2 mm comprising the steps of:
- a) delivering an aqueous dispersion of a mixture comprising the wettable structural organic floc, fluoropolymer floc and binder onto a screen of a papermaking device;
- b) withdrawing water from the aqueous dispersion to leave a wet paper felt;
- and
- c) drying the wet paper felt.
Dependencies are inferred from the claim text.