ELECTROSPINNING OF POLYAMIDE NANOFIBERS
First Claim
1. Process for the preparation of polyamide nanofibers by electrospinning, wherein the process is a multi-nozzle electrospinning process with the use of a multi-nozzle device or a nozzle-free electrospinning with the use of nozzle free device, comprising steps whereina high voltage is applieda polymer solution comprising a polymer and a solvent is fed to the multi-nozzle device or the nozzle free device and transformed under the influence of the high voltage into charged jet streamsthe jet streams are deposited on a substrate or taken up by a collector andthe polymer in the jet streams solidifies thereby forming nanofibres and wherein the polymer comprises a semi-crystalline polyamide having a C/N ratio of at most 5.5 and a weight average molecular weight (Mw) of at most 35,000.
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Accused Products
Abstract
The invention relates to a process for the preparation of polyamide nanofibers by electrospinning, wherein the process is a multi-nozzle electrospinning process with the use of a multi-nozzle device or a nozzle-free electrospinning with the use of nozzle free device, comprising steps wherein a high voltage is applied, a polymer solution comprising a polymer and a solvent is fed to the multi-nozzle device or the nozzle free device and transformed under the influence of the high voltage into charged jet streams the jet streams are deposited on a substrate or taken up by a collector, and the polymer in the jet streams solidifies thereby forming nanofibres, and wherein the polymer comprises a semi-crystalline polyamide having a C/N ratio of at most 5.5 and a weight average molecular weight (Mw) of at most 35,000. The invention also relates polyamide nanofibers made by the electrospinning process, as well as to products made thereof and use thereof.
7 Citations
14 Claims
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1. Process for the preparation of polyamide nanofibers by electrospinning, wherein the process is a multi-nozzle electrospinning process with the use of a multi-nozzle device or a nozzle-free electrospinning with the use of nozzle free device, comprising steps wherein
a high voltage is applied a polymer solution comprising a polymer and a solvent is fed to the multi-nozzle device or the nozzle free device and transformed under the influence of the high voltage into charged jet streams the jet streams are deposited on a substrate or taken up by a collector and the polymer in the jet streams solidifies thereby forming nanofibres and wherein the polymer comprises a semi-crystalline polyamide having a C/N ratio of at most 5.5 and a weight average molecular weight (Mw) of at most 35,000.
- 10. Nanofibres or nano-web consisting of a polymer composition comprising a polyamide having a C/N ratio of at most 5.5 and an Mw of at most 35,000.
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11. Nanofibres or nano-web consisting of a polymer composition comprising a polyamide having a C/N ratio of less than 5 and a Tm of at least 300°
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12. Nanofibres or nano-web consisting of a polymer composition comprising a polyamide having a C/N ratio of more than 5.5 and an Mw of at most 35,000 and a linear or branched polyamide having an Mw of more than 35,000.
Specification