Method for producing a polyamide nanofiber product by electrospinning
AssigneeMann+Hummel GmbH
InventorsNico Behrendt, Anton Kreiner, Maximilian Steinbrunner, Heiko Brosi, Bjoern Schmid
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Abstract
In a method for producing a polyamide nanofiber product that contains PTFE particles, a spinning solution containing polyamide, PTFE, and a conductivity-increasing additive is provided and nanofibers are produced by electrospinning from the spinning solution. The conductivity-increasing additive is an acid-resistant additive; a surfactant additive; or an acid-resistant and surfactant additive and contains one or more organic salts. The polyamide nanofiber product with PTFE particles is used in filter media and is especially applied to a filter layer of cellulose or synthetic material.
Claims14
A method for producing a polyamide nanofiber product that contains PTFE (polytetrafluoroethylene) particles, the method comprising:
- providing a spinning solution containing polyamide, PTFE particles, and a conductivity-increasing additive;
- electrospinning nanofibers from the spinning solution;
- wherein the conductivity-increasing additive comprises one or more organic salts;
- wherein the one or more organic salts includes a quaternary ammonium compound;
- wherein the quaternary ammonium compound is tetraethyl ammonium ethyl sulfate.
A method for producing a polyamide nanofiber product that contains PTFE (polytetrafluoroethylene) particles, the method comprising:
- providing a spinning solution containing polyamide, PTFE particles, and a conductivity-increasing additive;
- electrospinning nanofibers from the spinning solution;
- wherein the spinning solution contains PTFE particles in a range of 0.1% by weight to 10% by weight based on a basic batch weight of the spinning solution.
A method for producing a polyamide nanofiber product that contains PTFE (polytetrafluoroethylene) particles, the method comprising:
- providing a spinning solution containing polyamide, PTFE particles, and a conductivity-increasing additive;
- electrospinning nanofibers from the spinning solution;
- wherein the spinning solution contains the conductivity-increasing additive in a range of 0.1% by weight to 10% by weight of a basic batch weight of the spinning solution.
A method for producing a polyamide nanofiber product that contains PTFE (polytetrafluoroethylene) particles, the method comprising:
- providing a spinning solution containing polyamide, PTFE particles, and a conductivity-increasing additive;
- electrospinning nanofibers from the spinning solution;
- wherein the conductivity-increasing additive is added in a quantity causing the conductivity of the spinning solution to be greater than 1,000 μS/cm.
Dependencies are inferred from the claim text.