CN104894669A - Wet spinning method for solvent method cellulosic fibers - Google Patents
Wet spinning method for solvent method cellulosic fibers Download PDFInfo
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- CN104894669A CN104894669A CN201510263948.0A CN201510263948A CN104894669A CN 104894669 A CN104894669 A CN 104894669A CN 201510263948 A CN201510263948 A CN 201510263948A CN 104894669 A CN104894669 A CN 104894669A
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Abstract
The invention discloses a wet spinning method for solvent method cellulosic fibers. The wet spinning method comprises the following steps: a used spinning solution is upwards sprayed from a spinning nozzle and then is regenerated in a coagulating bath to obtain cellulosic fiber strands; the cellulosic fiber strands are subjected to spinning nozzle stretching between the spinning nozzle and a draw-off godet; primary drawing is formed between a drawing machine and the draw-off godet and is performed in a two-bath; secondary drawing is formed between a dragger of a cut-off machine and the drawing machine; and an aftertreatment step is performed after cutting off. According to the method, cotton pulp, wood pulp or cotton-wood mixed pulp can be used as raw materials, a three-component solution comprising alkali/urea/water or a four-component solution comprising alkali/urea/thiourea/water is used as a solvent, low temperature continuous dissolution is performed, so that the spinning solution is obtained; and the steps of filtering, defoaming and wet spinning are performed to obtain the solvent method cellulosic fibers; sulfur is not contained in finished products; the indexes of the finished products are the same as those of common viscose fibers; no poisonous or harmful gas is discharged, the cost is reduced, and the solvent method cellulosic fibers are totally environment-friendly economical regenerated cellulose fibers.
Description
Technical field
The present invention relates to a kind of spinning process, particularly relate to a kind of wet spinning process of cellulose fiber by solvent method.
Background technology
The production of environmental type cellulose fibre has become the common recognition of international and domestic society.The developed country such as American-European, Japanese is as far back as just stopped the various cellulose fibre production methods to severe environmental pollution such as NaOH/CS2 method many years ago.China improves constantly along with environmental protection consciousness, in the urgent need to a kind of production method of environmental type cellulose fibre.
Summary of the invention
In order to the weak point in solving the problem, the invention provides a kind of wet spinning process of cellulose fiber by solvent method.
In order to solve above technical problem, the technical solution used in the present invention is: a kind of wet spinning process of cellulose fiber by solvent method, the spinning solution that spinning process uses is regenerated as cellulose fibre strand upward after spinning head sprays coagulating bath, cellulose fibre strand forms shower nozzle stretching between spinning head and draw-off godet, drawing-off together with formed between drawing machine with draw-off godet, one drawing-off carries out in two baths, again through forming two road drawing-offs between the hauling machine and drawing machine of cutting machine, after cutting off, enter postprocessing working procedures namely wash again, oil, dry, packing, finished product dispatches from the factory.
The condition of molding of cellulose fibre strand is:
The dipping bath degree of depth of cellulose fibre strand in coagulating bath is 600 ~ 750 millimeters;
The temperature of coagulating bath is 20 ~ 50 degree, and the component of coagulating bath is: H2SO4 concentration is 10% ~ 30%, Na2SO4 concentration is 10% ~ 40%, and surplus is H2O.
The temperature of two baths are 20 ~ 70 degree, and two components of bathing are: H2SO4 concentration is 5% ~ 20%, H2O or H2SO4 concentration be 5%--20%, Na2SO4 concentration is 5%--20%, surplus is H2O.
The stretching rate of shower nozzle stretching is-10% ~ 60%, and the degree of draft of one drawing-off is 20 ~ 60%, two road degree of drafts is-1 ~ %3%.
The present invention is that alkali/urea/water three components or alkali/urea/sulphur urea/water Four composition are solvent, are prepared into spinning solution through low temperature continuous-dissolution with the mixed slurry of cotton pulp, wood pulp or Populus deltoides for raw material, and after filtration, deaeration, then to obtain through wet spinning.Finished product is sulfur-bearing not, and finished product index is consistent with common viscose fiber, without toxic and harmful discharge, with low cost, is the economical regenerated celulose fibre of a kind of environmental protection completely.
Detailed description of the invention
Spinning solution: spinning soulution, the concentrated solution of fiber-forming polymer.Spinning solution is regenerated as cellulose fibre strand upward after spinning head sprays coagulating bath, strand forms shower nozzle stretching between spinning head and draw-off godet, again through drawing-off together with being formed between drawing machine with draw-off godet (one drawing-off carries out in two baths), again through forming two road drawing-offs between the hauling machine and drawing machine of cutting machine, after cutting off, enter that namely postprocessing working procedures is carried out washing again, oils, dries, packed, finished product dispatches from the factory.
The condition of molding of cellulose fibre strand is; The dipping bath degree of depth of strand in coagulating bath is 600 ~ 750 millimeters.The temperature of coagulating bath is 20 ~ 50 degree, and the component of coagulating bath is: H2SO4 concentration is 10% ~ 30%, Na2SO4 concentration is 10% ~ 40%, and surplus is H2O.
Spinning solution is regenerated as cellulose fibre strand upward after spinning head sprays coagulating bath, and coagulating bath mixes by H2SO4, Na2SO4, H2O the spinning solution that makes formed and is regenerated as the liquid of cellulose fibre.Two baths are mixed by H2SO4, H2O and form or mix the assisted Regeneration formed, the liquid being beneficial to drawing-off by H2SO4, Na2SO4, H2O.
One drawing-off is linear velocity difference between drawing machine and draw-off godet and plays the effect of first time drawing-off, draws one degree of draft through formulae discovery.As a same reason, two road drawing-offs are linear velocity difference between hauling machine and drawing machine and play second time drawing-off effect, draw two road degree of drafts through formulae discovery.
The temperature of two baths are 20 ~ 70 degree, and two components of bathing are: H2SO4 concentration is 5% ~ 20%, H2O or H2SO4 concentration be 5%--20%, Na2SO4 concentration is 5%--20%, surplus is H2O.
The Pullin performances of cellulose fibre strand is; The stretching rate of shower nozzle stretching is-10% ~ 60%, and the degree of draft of one drawing-off is 20 ~ 60%, two road degree of drafts is-1 ~ %3%.
Embodiment 1
The dipping bath degree of depth is 750 millimeters; The temperature of coagulating bath is 25 degree, coagulating bath consist of H2SO410%, Na2SO415%.The temperature of two baths is 30 degree, and the component of two baths is: H2SO4 10%; The degree of draft of the stretching rate of shower nozzle stretching to be the degree of draft of-10%, one drawing-off be 30%, two road drawing-offs is-1%
The physical index of cellulose fibre strand is; Fiber number 1.67dtex, dry strong 2.0CN/dtex, dryly stretch 8%
Embodiment 2
The dipping bath degree of depth is 750 millimeters; The temperature of coagulating bath is 45 degree, coagulating bath consist of H2SO4 15%, Na2SO4 25%; The temperature of two baths is 60 degree, consisting of of two baths: H2SO4 10%, Na2SO4 5%; The stretching rate of shower nozzle stretching is 20%, and the degree of draft of one drawing-off is the degree of draft of 30%, two road drawing-offs is-3%;
The physical index of cellulose fibre strand is; Fiber number 1.67dtex, dry strong 2.3CN/dtex, dryly stretch 19%.
Above-mentioned embodiment is not limitation of the present invention; the present invention is also not limited in above-mentioned citing; the change that those skilled in the art make within the scope of technical scheme of the present invention, remodeling, interpolation or replacement, also all belong to protection scope of the present invention.
Claims (4)
1. the wet spinning process of a cellulose fiber by solvent method, it is characterized in that: the spinning solution that spinning process uses is regenerated as cellulose fibre strand upward after spinning head sprays coagulating bath, cellulose fibre strand forms shower nozzle stretching between spinning head and draw-off godet, drawing-off together with formed between drawing machine with draw-off godet, one drawing-off carries out in two baths, again through forming two road drawing-offs between the hauling machine and drawing machine of cutting machine, after cutting off, enter that namely postprocessing working procedures is carried out washing again, oils, dries, packed, finished product dispatches from the factory.
2. the wet spinning process of cellulose fiber by solvent method according to claim 1, is characterized in that: the condition of molding of described cellulose fibre strand is:
The dipping bath degree of depth of cellulose fibre strand in coagulating bath is 600 ~ 750 millimeters;
The temperature of coagulating bath is 20 ~ 50 degree, and the component of coagulating bath is: H2SO4 concentration is 10% ~ 30%, Na2SO4 concentration is 10% ~ 40%, and surplus is H2O.
3. the wet spinning process of cellulose fiber by solvent method according to claim 1, it is characterized in that: the temperature of described two baths are 20 ~ 70 degree, and two components of bathing are: H2SO4 concentration is 5% ~ 20%, H2O or H2SO4 concentration be 5%--20%, Na2SO4 concentration is 5%--20%, surplus is H2O.
4. the wet spinning process of cellulose fiber by solvent method according to claim 1, is characterized in that: the stretching rate of described shower nozzle stretching is-10% ~ 60%, and the degree of draft of one drawing-off is 20 ~ 60%, two road degree of drafts is-1 ~ %3%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510263948.0A CN104894669A (en) | 2015-05-22 | 2015-05-22 | Wet spinning method for solvent method cellulosic fibers |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510263948.0A CN104894669A (en) | 2015-05-22 | 2015-05-22 | Wet spinning method for solvent method cellulosic fibers |
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| CN104894669A true CN104894669A (en) | 2015-09-09 |
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| CN201510263948.0A Pending CN104894669A (en) | 2015-05-22 | 2015-05-22 | Wet spinning method for solvent method cellulosic fibers |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106591989A (en) * | 2016-12-08 | 2017-04-26 | 新乡化纤股份有限公司 | Continuous spinning process of regenerated cellulose filament fibers |
| CN107523889A (en) * | 2017-08-25 | 2017-12-29 | 孙飞勇 | The wet spinning process of cellulose carbamate |
Citations (5)
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| CN1594680A (en) * | 2004-06-29 | 2005-03-16 | 武汉大学 | Preparation method for regenerated cellulose fiber |
| US20050215778A1 (en) * | 2002-05-24 | 2005-09-29 | Fritz Loth | Method for the production of cellulose carbamate by means of reactive extrusion |
| CN1702201A (en) * | 2005-05-30 | 2005-11-30 | 武汉大学 | Method for preparing regenerative cellulose fiber by two-step coagulating bath process |
| CN101275307A (en) * | 2007-03-26 | 2008-10-01 | 江苏龙马绿色纤维有限公司 | Industrial method for preparing regenerated cellulose fiber |
| CN101429682A (en) * | 2008-11-28 | 2009-05-13 | 东华大学 | Method for producing regenerated cellulose fiber by dual-bath coagulation |
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2015
- 2015-05-22 CN CN201510263948.0A patent/CN104894669A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050215778A1 (en) * | 2002-05-24 | 2005-09-29 | Fritz Loth | Method for the production of cellulose carbamate by means of reactive extrusion |
| CN1594680A (en) * | 2004-06-29 | 2005-03-16 | 武汉大学 | Preparation method for regenerated cellulose fiber |
| CN1702201A (en) * | 2005-05-30 | 2005-11-30 | 武汉大学 | Method for preparing regenerative cellulose fiber by two-step coagulating bath process |
| CN101275307A (en) * | 2007-03-26 | 2008-10-01 | 江苏龙马绿色纤维有限公司 | Industrial method for preparing regenerated cellulose fiber |
| CN101429682A (en) * | 2008-11-28 | 2009-05-13 | 东华大学 | Method for producing regenerated cellulose fiber by dual-bath coagulation |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106591989A (en) * | 2016-12-08 | 2017-04-26 | 新乡化纤股份有限公司 | Continuous spinning process of regenerated cellulose filament fibers |
| CN106591989B (en) * | 2016-12-08 | 2020-02-28 | 新乡化纤股份有限公司 | Continuous spinning process for regenerated cellulose filament fibers |
| CN107523889A (en) * | 2017-08-25 | 2017-12-29 | 孙飞勇 | The wet spinning process of cellulose carbamate |
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