Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Process for the production of a cellulosic fiber from a solution of cellulose in a tertiary amine-oxide and device for carrying out said process

A cellulose solution, tertiary amine oxide technology, applied in the direction of single-component cellulose rayon, fiber chemical characteristics, textiles and papermaking, etc., can solve the problem of reducing equipment output, increasing fiber production costs, and unable to start the spinning process And other issues

Inactive Publication Date: 2009-08-12
LENZING AG
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, a lower number of openings reduces the equipment throughput and therefore increases the production cost of the fibers
[0007] According to the state of the art, the spinning process cannot be started without manual intervention after machine maintenance or automatic shutdown

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Process for the production of a cellulosic fiber from a solution of cellulose in a tertiary amine-oxide and device for carrying out said process
  • Process for the production of a cellulosic fiber from a solution of cellulose in a tertiary amine-oxide and device for carrying out said process
  • Process for the production of a cellulosic fiber from a solution of cellulose in a tertiary amine-oxide and device for carrying out said process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the invention are shown.

[0042]The process of producing cellulose fibers from cellulose solutions in tertiary amine oxides by the spray-wet process generally includes several steps that have a significant effect on the structure and texture of the filaments. A first embodiment of an apparatus 1 suitable for carrying out the process is as Figure 1A shown. First, the cellulose solution is extruded through a spinneret (not shown), which may include one or more openings arranged in various configurations, such as one or more circular holes, and the like. Alternatively, the spinneret is a rectangular spinneret for spinning the filaments into a curtain form.

[0043] The filaments 2 thus obtained are guided through the air gap 3 between the spinneret and the vessel 4 containing the precipitation bath. While passing through the air ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A process for the production of a cellulosic fiber from a solution of cellulose in a tertiary amine-oxide via a jet-wet process according to the present invention comprises the steps of pressing the solution of cellulose through a spinneret, thereby obtaining filaments, conducting the filaments through an air gap into a container containing a precipitation bath, drawing the filaments in the air gap, transporting the filaments out of the precipitation bath, further processing of the filaments, wherein drawing of the filaments is performed via a mechanically driven drawing-off device exerting a drawing force and at least part of the drawing force is transmitted onto the filaments by contacting the filaments with the drawing-off device at a location within the precipitation bath.

Description

technical field [0001] The invention relates to a process for producing cellulose fibers from a cellulose solution in a tertiary amine oxide according to claim 1 and to an apparatus for carrying out the process according to claim 12 . Background technique [0002] In recent years, various processes have been developed for the production of cellulose fibers in a mixture of organic solvents and water. Cellulose fibers produced with such solutions are called Lyocell fibers. Currently the only profitable process to obtain Lyocell fibers is production with tertiary amine oxide solvents, in particular N-methylmorpholine-N-oxide (NMMO). Fibers produced by this process are characterized by high tenacity, high wet modulus and enhanced hook strength and are known as the "amine oxide process". [0003] From US4246221 is known a solution comprising cellulose dissolved in a tertiary amine N-oxide solvent, containing a non-solvent for the cellulose such as water, shaped by extrusion or ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): D01D5/06D01F2/00
CPCD01D5/16D01F2/00
Inventor C·施雷姆普夫H·鲁夫H·菲尔戈G·格贝茨伯格
Owner LENZING AG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com