CN101736435A - Method for producing soft polyurethane fiber - Google Patents
Method for producing soft polyurethane fiber Download PDFInfo
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- CN101736435A CN101736435A CN200910259777A CN200910259777A CN101736435A CN 101736435 A CN101736435 A CN 101736435A CN 200910259777 A CN200910259777 A CN 200910259777A CN 200910259777 A CN200910259777 A CN 200910259777A CN 101736435 A CN101736435 A CN 101736435A
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Abstract
The invention discloses a method for producing a soft polyurethane fiber, which comprises the following steps of: carrying out mixture reaction on substances of polyol which has the molecular weight of larger than 3,000 and a side group (methyl or ethyl) and diisocyanate as raw materials to obtain an isocyanate terminated prepolymer; dissolving the prepolymer by using an amide compound and then carrying out mixture reaction with an amine chain extending agent to obtain a polyurethane-urea solution; adding additive into the generated polyurethane-urea solution to obtain a polyurethane spinning stock solution by adopting a polyurethane and polyurethane-urea compound as a repeated unit; and aging the polyurethane spinning stock solution and then carrying out spinning by a dry spinning method to obtain the polyurethane fiber. The polyurethane fiber has the characteristics of higher extension and lower stress so that a fabric has higher comfort.
Description
Technical field
The present invention relates to a kind of soft polyurethane fiber production method, belong to the chemical fibre production technical field.
Background technology
Polyurethane elastomeric fiber since emerging, because of its excellent properties that has, be widely used in the garment material field.But, along with people are more and more higher to the requirement of dress ornament comfortableness, in the active demand polyurethane elastomeric fiber fabric knitting process, under certain drawing-off multiplying power, have stress growth characteristics slowly, just contain the ammonia fabric and have characteristics soft, comfortable and easy to wear.
Summary of the invention
The production method that the purpose of this invention is to provide a kind of soft polyurethane fiber soft, comfortable and easy to wear.
The preparation method of a kind of soft polyurethane fiber of the present invention comprises the steps:
Use molecular weight more than or equal to 3000 and the polymeric dihydric alcohol and the diisocyanates material that have a side group (methyl or ethyl) obtain isocyanate-terminated prepolymer as the raw material hybrid reaction;
Prepolymer is obtained polyurethane urea solutions with amide compound dissolving back with the amine chain extender hybrid reaction;
Add additive in the polyurethane urea solutions that generates, obtaining with polyurethanes and polyurethanes carbamide compound is the spandex fiber stoste of repetitive;
With carrying out the dry-spinning method spinning after the ageing of spandex fiber stoste, obtain spandex fibre;
The preparation method of soft polyurethane fiber of the present invention, the mol ratio of described diisocyanates material and polymerized polyalcohol is 1.55: 1-2.15: 1.
The preparation method of soft polyurethane fiber of the present invention, wherein the solid content of polyurethane urea solutions is 25%-35%.
The preparation method of soft polyurethane fiber of the present invention, wherein amide compound is selected from dimethyl formamide, dimethylacetylamide.
The preparation method of soft polyurethane fiber of the present invention, the wherein mixture formed by the material of following molar ratio of amine chain extender: ethylenediamine 50-85; 2 methyl pentamethylenediamine or propane diamine 15-50, wherein chain extender also comprises at least a single functionality chain terminating agent, and described terminator is selected from one of the primary amine of single functionality or secondary amine, dimethylamine, diethylamine, two-n-butylamine, n-butylamine, n-hexylamine, cyclohexylamine, monoethanolamine or its mixture.
The preparation method of the elastic spandex fiber of anti-xanthochromia the of the present invention, wherein digestion time is 30-60 hour.
The preparation method of the elastic spandex fiber of anti-xanthochromia the of the present invention, wherein use in the dry-spinning method hot nitrogen or air in circular or square path to the spinning solution oven dry, through drawing-off, oil, reel and make spandex fibre.
The preparation method of the elastic spandex fiber of anti-xanthochromia the of the present invention, wherein additive comprises TITANIUM DIOXIDE DELUSTRANT, magnesium stearate lubricant, UV stabilizer T inuvin 234.
Beneficial effect of the present invention be soft section of polymer mainly be by molecular weight 3000, the polymeric dihydric alcohol that has a side group (methyl or ethyl) constitute, therefore soft section have higher flexibility; The mixed amine chain extender has also destroyed hard segment structure regularity, has made hard section also have certain compliance simultaneously, thereby guarantees that the spandex silk has the advantages that elongation is higher, stress is lower, and then makes fabric have higher comfortableness.
Describe the production method of soft polyurethane fiber of the present invention in detail below in conjunction with the accompanying drawing specific embodiment.
Load-the deformation curve of Fig. 1, the embodiment of the invention 1 and 2 soft polyurethane fiber.
The specific embodiment
Embodiment 1
Get the polymeric dihydric alcohol that has methyl 3500 grams and 4 of molecular weight 3000,4-methyl diphenylene diisocyanate 450 grams obtain the prepolymer that two ends have isocyanate group at 85 ℃ of reaction 120min, add 7090 gram dimethylacetylamide dissolvings and form solution.Add fast while stirring 30 the gram ethylenediamines, 17 the gram 2 methyl pentamethylenediamines, 5 the gram monoethanolamines be dissolved in 885 the gram dimethylacetylamides in formed solution, carry out chain extending reaction, the polyurethane urea solutions that obtains.Add then and contain the TiO2:5 gram, dolomol: 10 grams, Tinuvin 234:15 gram, the dispersion liquid of DMAC:200 gram obtains spinning solution after mixing, with this spinning solution ageing after 30 hours, in circular or square path, extrude, use hot nitrogen or air oven dry by spinning head, through drawing-off, oil, reel, just can make have low stress, the soft spandex silk of high elongation, shown in its load-deformation curve sees that curve is 1. among Fig. 1.
Embodiment 2 these examples are comparative example.
Polymeric dihydric alcohol 3250 grams and 4 of molecular weight 2000,4-methyl diphenylene diisocyanate 650 grams obtain the prepolymer that two ends have isocyanate group at 85 ℃ of reaction 120min, add 6643 gram dimethylacetylamide dissolvings and form solution.Add fast while stirring 44 the gram ethylenediamines, 24 the gram 2 methyl pentamethylenediamines, 7.0 the gram monoethanolamines be dissolved in 1276 the gram dimethylacetylamides in formed solution, carry out chain extending reaction, the polyurethane urea solutions that obtains.Add then and contain TiO2:5g, dolomol: 10g, Tinuvin 234:15g, the dispersion liquid of DMAC:200g obtains spinning solution after mixing, with this spinning solution ageing after 30 hours, in circular or square path, extrude, use hot nitrogen or air oven dry by spinning head, through drawing-off, oil, reel, just can make the spandex silk, shown in its load-deformation curve sees that curve is 2. among Fig. 1.
Embodiment 1 and embodiment 2 (comparative example) relevant parameter see the following form:
| 300% stress (cn) | Fracture strength (cn) | Extension at break (%) | |
| Embodiment 1 | ??9.3 | ??85.5 | ??838 |
| Comparative example | ??21.2 | ??109.2 | ??618 |
From the load-deformation curve of spandex silk and test data as can be seen, adopt 3000 molecular weight to have the embodiment spinning physical performance index of polymeric dihydric alcohol of side group (methyl or ethyl) and the comparative example of employing 2000 molecular weight polymerized dihydroxylic alcohols is compared, drafting multiple is in the 200-400% interval, stress growth is slower, meets the ammonia fabric characteristics comfortable and easy to wear that contain.
The foregoing description only is that preferred implementation of the present invention is described; be not that scope of the present invention is limited; design under the prerequisite of spirit not breaking away from the present invention; various distortion and improvement that the ability those of ordinary skill is made technical scheme of the present invention all should fall in the definite protection domain of claims of the present invention.
Claims (8)
1. the preparation method of a soft polyurethane fiber comprises the steps:
Use polymerized polyalcohol as molecular weight more than or equal to 3000 and have the polymeric dihydric alcohol of side group, wherein side group comprises that methyl or ethyl and diisocyanates material obtain isocyanate-terminated prepolymer for the raw material hybrid reaction;
Prepolymer is obtained polyurethane urea solutions with amide compound dissolving back with the amine chain extender hybrid reaction;
Add additive in the polyurethane urea solutions that generates, obtaining with polyurethanes and polyurethanes carbamide compound is the spandex fiber stoste of repetitive;
With carrying out the dry-spinning method spinning after the ageing of spandex fiber stoste, obtain spandex fibre.
2. the preparation method of soft polyurethane fiber as claimed in claim 1, the mol ratio of described diisocyanates material and polymerized polyalcohol is 1.55: 1-2.15: 1.
3. the preparation method of the described soft polyurethane fiber of claim 2 is characterized in that, the solid content of described polyurethane urea solutions is 25%-35%.
4. the preparation method of the described soft polyurethane fiber of claim 3 is characterized in that, described amide compound is selected from dimethyl formamide, dimethylacetylamide.
5. the preparation method of the described soft polyurethane fiber of claim 4 is characterized in that, the mixture that described amine chain extender is made up of the material of following molar ratio: ethylenediamine 50-85; 2 methyl pentamethylenediamine or propane diamine 15-50, described chain extender also comprises at least a single functionality chain terminating agent, and described terminator is selected from one of the primary amine of single functionality or secondary amine, dimethylamine, diethylamine, two-n-butylamine, n-butylamine, n-hexylamine, cyclohexylamine, monoethanolamine or its mixture.
6. the preparation method of the described elastic spandex fiber of anti-xanthochromia of claim 5 is characterized in that, described digestion time is 30-60 hour.
7. the preparation method of the described elastic spandex fiber of anti-xanthochromia of claim 6 is characterized in that, use in the described dry-spinning method hot nitrogen or air in circular or square path to the spinning solution oven dry, through drawing-off, oil, reel and make spandex fibre.
8. the preparation method of the described elastic spandex fiber of anti-xanthochromia of claim 7 is characterized in that, described additive comprises TITANIUM DIOXIDE DELUSTRANT, magnesium stearate lubricant, UV stabilizer T inuvin 234.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910259777A CN101736435A (en) | 2009-12-24 | 2009-12-24 | Method for producing soft polyurethane fiber |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910259777A CN101736435A (en) | 2009-12-24 | 2009-12-24 | Method for producing soft polyurethane fiber |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108264627A (en) * | 2018-01-18 | 2018-07-10 | 河北邦泰氨纶科技有限公司 | A kind of low melting point spandex section |
| CN108342833A (en) * | 2017-12-31 | 2018-07-31 | 广州海鑫无纺布实业有限公司 | A kind of preparation method of the high-hydroscopicity silk fiber non-woven fabrics of color inhibition |
| CN112899809A (en) * | 2021-02-25 | 2021-06-04 | 汪宜春 | Production process of heat-resistant high-elongation spandex fiber |
| CN114134596A (en) * | 2022-01-13 | 2022-03-04 | 华峰化学股份有限公司 | Method for preparing dry-spun spandex by adopting mixed solvent |
-
2009
- 2009-12-24 CN CN200910259777A patent/CN101736435A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108342833A (en) * | 2017-12-31 | 2018-07-31 | 广州海鑫无纺布实业有限公司 | A kind of preparation method of the high-hydroscopicity silk fiber non-woven fabrics of color inhibition |
| CN108264627A (en) * | 2018-01-18 | 2018-07-10 | 河北邦泰氨纶科技有限公司 | A kind of low melting point spandex section |
| CN112899809A (en) * | 2021-02-25 | 2021-06-04 | 汪宜春 | Production process of heat-resistant high-elongation spandex fiber |
| CN114134596A (en) * | 2022-01-13 | 2022-03-04 | 华峰化学股份有限公司 | Method for preparing dry-spun spandex by adopting mixed solvent |
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| ASS | Succession or assignment of patent right |
Owner name: YANTAI TAYHO ADVANCED MATERIALS CO., LTD. Free format text: FORMER OWNER: YANTAI SPANDEX CO., LTD. Effective date: 20120306 |
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Effective date of registration: 20120306 Address after: 264006 No. 10, Heilongjiang Road, Yantai economic and Technological Development Zone, Yantai, Shandong Applicant after: Yantai Tayho Advanced Materials Co., Ltd. Address before: 264006 No. 10, Heilongjiang Road, Yantai economic and Technological Development Zone, Yantai, Shandong Applicant before: Yantai Spandex Co., Ltd. |
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Application publication date: 20100616 |