CN101230498B - Three-dimensional crimp fibre - Google Patents
Three-dimensional crimp fibre Download PDFInfo
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- CN101230498B CN101230498B CN2007100629386A CN200710062938A CN101230498B CN 101230498 B CN101230498 B CN 101230498B CN 2007100629386 A CN2007100629386 A CN 2007100629386A CN 200710062938 A CN200710062938 A CN 200710062938A CN 101230498 B CN101230498 B CN 101230498B
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Abstract
The invention provides a three-dimensional crimped fiber and consists of a first polymer component and a second polymer component. The second polymer is at least two discontinuous regions on the cross section of the fiber. At least two discontinuous regions of the second polymer are distributed in the first component or at least part of the two discontinuous regions is connected with the first component to form at least three separate regions. The regions formed by the first polymer component and the second polymer component respectively present an unsymmetrical mechanical structure. The technical proposal relieve the strict restrictions for the melt viscosity of the two components in the process of preparing the three-dimensional crimped composite fiber as well as the problem of the bend angle, and greatly widens the restrictions for the melt apparent viscosity difference and spinnability of the two components in the process of spinning the other sections. Simultaneously, the crimped property of the three-dimensional crimped composite fiber is equal to or better than the core-shift sheath-core fiber.
Description
Technical field
The present invention relates to a kind of 3-D crimped fiber, particularly a kind of 3-D crimped fiber of controlling crimpness belongs to the composite fibre technology field.
Background technology
Manufacture method with the one-component fiber of tridimensional three-dimensional coiled structure and composite fibre (concentric type sheath core fiber exception) has multiple, but concludes to get up can be divided into two classes:
One class is to send into typing in texturing jet or the curler with the High Temperature High Pressure thermal current after the spinning, obtains the three-dimensional crimp effect, and these class methods are to impose on the coiling method of fiber behind the fiberizing.Another kind of method is by different components or other asymmetric factor or condition, in fiber extrusion molding process, brings up the internal structure that has asymmetric factor, and makes asymmetric factor show effect in the process of back, thereby forms 3-D crimped fiber.
What application was more usually is a kind of method in back, is many with bi-component composite fiber again wherein.Bi-component composite fiber is made of the polymeric components of two kinds of different components, on whole fibre length, is divided into two different obvious zones, or is parallel type, or be core-skin type, wherein, obtain crimped fibre, and core-skin type should be got rid of the skin-core structure of concentric type.
Parallel composite fiber has good crimp property, but in production application, because there is the difference of the factors such as apparent viscosity of melt index and melt or solution in the two-phase that flows side by side, often compound dynamic analysis of spinning can produce the elbow angle on the spinnerets surface in spinning process, and the inhomogeneities of fibre section structure and performance can be caused in the elbow angle in spinning process, even can produce the strand contamination in spinneret face, the situation that spinning can't be carried out, thereby, in actual production, require to avoid as far as possible or reduce the appearance of this kind situation.The apparent viscosity difference that under equal conditions reduces two components can reduce the adverse effect that cause at the elbow angle, the elbow angle always bends towards the high component of apparent viscosity one side, its interface shape of low viscosity component is always around the high viscosity component, the technical staff can be according to elbow angular direction and fibre section shape in actual production, regulate technological temperature and reduce the elbow angle, but the effect of doing like this is often undesirable.When the apparent melt viscosity difference of two components when a component spinnability is too poor too greatly or wherein, particularly when adding the functional component of more powder, spinning might cause spinning to carry out because of apparent viscosity is too big or spinnability is too poor.
Though the sheath core fiber elbow angle influence in spinning core shift formula is less, but because the asymmetric degree of fibre section is usually less than the composite fibre of parallel type, so under square one, the crimp property of the composite fibre that obtains is often not as parallel composite fiber.And sheath core fiber requires the apparent viscosity of cortex component to be less than or equal to the core layer component apparent viscosity, and when cortex component apparent viscosity was far longer than the sandwich layer apparent viscosity, the core-skin cross section might can't form.Therefore, in the production of composite fibre, controlling two component apparent melt viscosity, how to reduce the influence at elbow angle, and keep good fiber crimp performance, is the problem that needs solve.
Summary of the invention
The object of the present invention is to provide a kind of 3-D crimped fiber of novelty, can be designed to different mechanics dissymmetrical structures as required, thereby make composite fibre form specific three-dimensional crimp structure.This fiber not only has good curl characteristics, and can well alleviate elbow angle problem aborning, the proposition of this technical scheme has solved the elbow angle problem that parallel composite fiber exists, and its curl characteristics also is equal to or better than the sheath core fiber of core shift formula simultaneously.
To achieve these goals, the invention provides a kind of 3-D crimped fiber, this fiber comprises first polymers compositions and second polymers compositions, on fiber cross section, described second polymers compositions is at least two discontinuous zones, thereby at least two discontinuity zones that this second polymers compositions is are distributed within first component or be connected with first component to small part and form at least three isolated areas, and first polymers compositions and second component polymer institute zone of formation respectively is the mechanics dissymmetrical structure.
Among the present invention, when the percent thermal shrinkage of two component polymers not simultaneously, the above-mentioned mechanics dissymmetrical structure of easier formation.
Mechanics dissymmetrical structure of the present invention is meant that the center of gravity of two zoness of different that component constituted in described composite fibre cross section does not overlap, and the percent thermal shrinkage difference of two component polymers.Specifically, in the fiber, the zone that the summation of second each discontinuity zone of polymers compositions and first polymers compositions form is the mechanics dissymmetrical structure, and just, the summation of second each discontinuity zone of polymers compositions does not overlap with the center of gravity in the zone that first polymers compositions forms.
Here, first polymers compositions among the present invention and second polymers compositions are not limited to two kinds and form different polymers compositionss, and it can be a similar polymers but different molecular weight also can be the inhomogeneity polymer.No matter whether each component is same base polymer, all should meet the following conditions: preferred described two component polymers satisfy the ratio of apparent viscosity greater than 1.0, the ratio of preferred two component polymer apparent viscosities is greater than 1 less than 2.5, and more preferably scope is between 1.2-1.5.
Most preferably of the same race or isonomic polymer is respectively as first and second polymers compositionss, because the compatibility of two components is best at this moment among the present invention.For example, it is a kind of of PET, PBT, PTT kind that preferred first and second polymers compositionss are selected from polyester respectively, and the lactam of perhaps selecting oneself respectively is a kind of of nylon 6, nylon 66 etc.
In the preferred embodiment of the present invention, on fiber cross section, described second polymers compositions is rendered as three discontinuous zones, thereby three discontinuous area distribution of this second polymers compositions are connected within first component or to small part first component and form four isolated areas, each discontinuity zone of first component and be the mechanics dissymmetrical structure with the zone of second component.
More preferably, when three discontinuous area distribution of second polymers compositions partly are connected when forming four isolated areas with first component within first component or at least, the line of the center of gravity in three discontinuous zones of this second polymers compositions constitutes an equilateral triangle.The present application people discovers that under this kind situation, the crimp property of fiber and elbow horn shape condition and spinnability all are in a gratifying scope; Can certainly be designed to different mechanics dissymmetrical structures as required, thereby make composite fibre form specific three-dimensional crimp structure.
The curl characteristics of composite fibre is relevant with factors such as each component melt viscosity, melt elasticity, smelt surface tension, melt temperature, shear rates, and composite fibre adopts structure of the present invention, and its curl characteristics can well be realized.
Though be all two component 3-D crimped fibers, 3-D crimped fiber of the present invention and parallel type bi-component composite fiber difference are: there are two independent parts in the cross section of parallel composite fiber, two kinds of components occupy half of fiber, because there is the difference of apparent viscosity in the melt compound tense of two components in the process of spinning, it becomes the important reasons that the elbow angle produces; There is the isolated area more than three or three in 3-D crimped fiber of the present invention cross section, and wherein a kind of component constitutes an independent district, and this zone links to each other with other, and other zone is made of second kind of component.
3-D crimped fiber of the present invention cross section should be circle usually, and wherein first polymers compositions constitutes an independent zone, and this zone links to each other with other, and the zone is made of second polymers compositions in addition.Can contain function component in second polymers compositions, these function components can be conductive materials, antibacterial material, uvioresistant material, negative oxygen ion material, far infrared materials etc.
Described conductive materials can be carbon black, metal oxide; Described antibacterial material can be that silver is antimicrobial powder or other antimicrobial powder; Described uvioresistant material can be the uvioresistant powder; Described negative oxygen ion material can be the powder of mineral matters such as tourmaline; Described far infrared materials can be a far infrared powder.
The adding of above-mentioned functions component makes fiber of the present invention not only have good curl characteristics, and has increased the rich functions characteristic, has satisfied the special applications under various varying environments, the different demand.
Polymers compositions of the present invention is to can be used in the various polymer of producing viscose and synthetic fiber, include but not limited to: produce the polymer-modified of cellulose, polyamide, polyester or the polypropylene of viscose and them, preferred as polycaprolactam, polyethylene terephthalate, polyethylene, polypropylene, polyvinyl chloride, polycaprolactam hexamethylene diamine (nylon 66), PBT, PTT and polymer-modified described polymer thereof.
Among the present invention, the weight ratio of first polymers compositions and second polymers compositions is 5/95-45/55, preferred 6/94-40/60.
The preparation method of two component three dimensional crimped fibre of the present invention is: get of the same race and polymer that molecular weight (viscosity) is different or two kinds similar polymers not, the ratio of control viscosity is greater than 1, with making blended slice after the mixing of second component employing parallel dual-screw extruding machine, use the spinning of bi-component spinning machine with first component then; First component, the second component raw material add screw extruder respectively, after operations such as spinning, drawing-off, typing, coiling, make the composite fibre that has three-dimensional crimp with specific function.
Among the above-mentioned preparation method, concrete technological parameter is: spinning body temperature is 200-300 ℃; Spinning speed be 200-4500 rice/minute; Drawing temperature is 40-160 ℃; Setting temperature is 60-230 ℃; Have the three-dimensional crimp performance after the drawing of fiber typing, its crimp percent is between 3-40%, and the melt thread does not have obvious elbow angle to occur in spinning process.
Also can in second component, add function component, as conductive materials, antibacterial material, uvioresistant material, negative oxygen ion material, far infrared materials etc.
Satisfy the bi-component composite fiber under this kind situation, under equal conditions, compare with composite fibres such as parallel type and eccentric sheath core patterns, can either well improve elbow angle problem, and widened composite fibre to the restriction of two component apparent melt viscosity differences with to the restriction of two components to spinnability, its curl characteristics also is equal to or better than the sheath core fiber of core shift formula simultaneously.
Based on above description, the invention provides a kind of bi-component composite fiber that is different from parallel type and core-skin type, can be designed to different mechanics dissymmetrical structures as required, thereby make composite fibre form specific three-dimensional crimp structure.This fiber has good crimp property and spinnability, and does not have serious elbow angle phenomenon in its production process, make production process relatively smoothly and the fibre structure and the performance that obtain have good uniformity.
Description of drawings
Fig. 1 is the schematic cross-section of fiber of the present invention, and wherein, 1 is the 1st component, and 2 is second component;
Fig. 2 is the another kind of schematic cross-section of fiber of the present invention;
Fig. 3 is a most preferred embodiment of the present invention.
The specific embodiment
Raw material is formed: first component is a polycaprolactam; Second component is polycaprolactam/carbon black; The two viscosities il ratio is 1.2.
Preparation process:, use the spinning of bi-component spinning machine with first component then with making blended slice after the mixing of second component employing parallel dual-screw extruding machine; First component, the second component raw material add screw extruder respectively, two components are after the duct of distribution plate is compound, by spinnerets guide hole ejection moulding, after operations such as spinning, drawing-off, typing, coiling, make the composite fibre that has three-dimensional crimp with specific function, the cross sectional shape of fiber as shown in Figure 3.
1 zone of representing first polymers compositions to form in the accompanying drawing 3,2,21,22 isolated areas of representing second polymers compositions to form, the zone, wherein the zone of second polymers compositions of 2 representatives is connected with first component zone, other parts are the edge of fiber, the zone of second polymers compositions of 21 and 22 representatives is within the zone of first polymers compositions, 2,21, the triangle that 22 central point is formed is an isosceles triangle, 2,21 and 22 zones that form and asymmetric with the regional mechanics of first polymers compositions formation, just, 2, the center in zone 21 and 22 zones that form and that form with first polymers compositions is mended and is overlapped.
Technological parameter: compound is 8/92 than (first component/second component); The second component ratio of component (polycaprolactam/carbon black) is 85/15; Spinning body temperature is 282 ℃; Spinning speed is 2500 meters/minute; Drawing temperature is 8 ℃; Setting temperature is ℃; Have the three-dimensional crimp performance after the drawing of fiber typing, crimp percent can reach 32%, and the melt thread does not have obvious elbow angle good spinning property to occur in spinning process.
Raw material is formed: first component is a polyethylene terephthalate; Second component is polyethylene terephthalate/alundum (Al, and the two viscosities il ratio is 1.5.
Preparation process: second component is made blended slice after adopting parallel dual-screw extruding machine to mix, use the bi-component spinning machine to carry out spinning with first component then, raw material first component, second component add screw extruder respectively, two components are after the duct of distribution plate is compound, by spinnerets guide hole ejection moulding, after operations such as spinning, drawing-off, typing, coiling, make the composite fibre that has three-dimensional crimp with far-infrared functional; The cross sectional shape of fiber as shown in Figure 2.
1 zone of representing first polymers compositions to form in the accompanying drawing 2, what 2, second polymers compositions of 23,24 representatives formed is connected with the first polymers compositions zone, other parts are the edge of fiber, 2, the triangle of 23,24 central point composition is an isosceles triangle, 2, regional mechanics 23 and 24 zones that form and that form with first polymers compositions is asymmetric, just, the center in zone 2,23 and 24 zones that form and that form with first polymers compositions does not overlap.
Technological parameter is: compound is 15/85 than (first component/second component); It is 90/10 that second component is formed (polyethylene terephthalate/alundum (Al); Spinning body temperature is 92 ℃; Spinning speed is 2200 meters/minute; Drawing temperature is 95 ℃; Setting temperature is 60 ℃; The three-dimensional crimp performance can reach 26% behind the drawing of fiber, and the melt thread does not have obvious elbow angle good spinning property to occur in spinning process.
Embodiment 3
Raw material is formed: first component is a polypropylene; Second component is polypropylene/tourmaline, and the two viscosities il ratio is 1.3.
Preparation process: use the composite spinning machine spinning, use screw extruder to inject raw material first component, second component respectively, two components are after the duct of distribution plate is compound, by spinnerets guide hole ejection moulding, after operations such as spinning, drawing-off, typing, coiling, get finished product, the cross sectional shape of fiber as shown in Figure 1.
1 zone of representing first polymers compositions to form in the accompanying drawing 1, second polymers compositions zone of 2 representatives is connected with first polymers compositions zone part, other parts are the edge of fiber, the zone of second polymers compositions of 21 representatives is within the zone of first polymers compositions, 2 and 21 zones that form and asymmetric with the regional mechanics of first polymers compositions formation, just, the center in zone 2 and 21 zones that form and that form with first polymers compositions does not overlap.
Technological parameter: compound is 30/70 than (first component/second component); It is 75/25 that second component is formed (polypropylene/tourmaline); Spinning body temperature is 264 ℃; Spinning speed is 1800 meters/minute; Drawing temperature is 70 ℃; Setting temperature is 0 ℃; The three-dimensional crimp performance reaches 28% and also can discharge negative oxygen ion behind the drawing of fiber, and the melt thread does not have obvious elbow angle to occur in spinning process.
Embodiment 4
Raw material is formed: first component is a polyethylene terephthalate; Second component is a polytrimethylene terephthalate; The two viscosities il ratio is 1.5.
Preparation process:, use the spinning of bi-component spinning machine with first component then with making blended slice after the mixing of second component employing parallel dual-screw extruding machine; First component, the second component raw material add screw extruder respectively, after operations such as spinning, drawing-off, typing, coiling, make the composite fibre that has three-dimensional crimp with specific function, and the cross sectional shape of fiber as shown in Figure 3.
Technological parameter: compound is 5/95 than (first component/second component); Spinning body temperature is 295 ℃; Spinning speed is 2500 meters/minute; Drawing temperature is 95 ℃; Setting temperature is 130 ℃; Having the three-dimensional crimp performance after the drawing of fiber typing is 23%, and the melt thread does not have obvious elbow angle to occur in spinning process.
Embodiment 5
Raw material is formed: first component is a polycaprolactam; Second component is the polycaprolactam diamines; The two viscosities il ratio is 2.
Preparation process:, use the spinning of bi-component spinning machine with first component then with making blended slice after the mixing of second component employing parallel dual-screw extruding machine; First component, the second component raw material add screw extruder respectively, after operations such as spinning, drawing-off, typing, coiling, make the composite fibre that has three-dimensional crimp with specific function, and the cross sectional shape of fiber as shown in Figure 3.
Technological parameter: compound is 5/95 than (first component/second component); Spinning body temperature is 288 ℃; Spinning speed is 2400 meters/minute; Drawing temperature is 120 ℃; Setting temperature is 118 ℃; Having the three-dimensional crimp performance after the drawing of fiber typing is 36%, and the melt thread does not have obvious elbow angle to occur in spinning process.
Embodiment 6
Raw material is formed: first component is a polycaprolactam; Second component is the polycaprolactam diamines; The two viscosities il ratio is 2.5, and other are with embodiment 5.Having the three-dimensional crimp performance after the drawing of fiber typing is 40%.
Claims (36)
1. 3-D crimped fiber, this fiber comprises first polymers compositions and second polymers compositions, on fiber cross section, described second polymers compositions is at least two discontinuous zones, thereby at least two discontinuity zones of this second polymers compositions are distributed within first component or be connected with first component to small part and form at least three isolated areas, and first polymers compositions and second component polymer institute zone of formation respectively is the mechanics dissymmetrical structure.
2. crimped fibre according to claim 1 is characterized in that first polymers compositions is different with the second polymers compositions percent thermal shrinkage.
3. crimped fibre according to claim 1 is characterized in that described mechanics dissymmetrical structure is meant that the center of gravity of two zoness of different that component constituted in described composite fibre cross section does not overlap.
4. according to any one described crimped fibre of claim 1-3, it is characterized in that described first polymers compositions and second polymers compositions are polymers compositions of the same race or not of the same race, the ratio of the apparent viscosity of two kinds of polymer is greater than 1.0.
5. crimped fibre according to claim 4, the ratio of apparent viscosity that it is characterized in that two kinds of polymer greater than 1 less than 2.5.
6. crimped fibre according to claim 5, the ratio range of apparent viscosity that it is characterized in that two kinds of polymer is between 1.2-1.5.
7. according to any one described crimped fibre of claim 1-3,5-6, it is characterized in that on fiber cross section, described second polymers compositions is rendered as three discontinuous zones, thereby three discontinuous area distribution of this second polymers compositions are connected within first component or to small part first component and form four isolated areas.
8. crimped fibre according to claim 4, it is characterized in that on fiber cross section, described second polymers compositions is rendered as three discontinuous zones, thereby three discontinuous area distribution of this second polymers compositions are connected within first component or to small part first component and form four isolated areas.
9. crimped fibre according to claim 7 is characterized in that the line of the center of gravity in three discontinuous zones of this second polymers compositions constitutes an equilateral triangle in described four isolated areas.
10. crimped fibre according to claim 8 is characterized in that the line of the center of gravity in three discontinuous zones of this second polymers compositions constitutes an equilateral triangle in described four isolated areas.
11. according to each described crimped fibre of claim 1-3,5,6,8-10, it is characterized in that containing function component in second polymers compositions, described function component is a kind of or its combination that is selected from conductive materials, antibacterial material, uvioresistant material, negative oxygen ion material or far infrared materials.
12. crimped fibre according to claim 4, it is characterized in that containing function component in second polymers compositions, described function component is a kind of or its combination that is selected from conductive materials, antibacterial material, uvioresistant material, negative oxygen ion material or far infrared materials.
13. crimped fibre according to claim 7, it is characterized in that containing function component in second polymers compositions, described function component is a kind of or its combination that is selected from conductive materials, antibacterial material, uvioresistant material, negative oxygen ion material or far infrared materials.
14., it is characterized in that described polymers compositions is to can be used in the various polymer of producing viscose and synthetic fiber according to claim 1-3,5-6, each described crimped fibre of 8-10,12-13.
15., it is characterized in that described polymers compositions is to can be used in the various polymer of producing viscose and synthetic fiber according to the described crimped fibre of claim 4..
16. crimped fibre according to claim 7 is characterized in that described polymers compositions is to can be used in the various polymer of producing viscose and synthetic fiber.
17. crimped fibre according to claim 11 is characterized in that described polymers compositions is to can be used in the various polymer of producing viscose and synthetic fiber.
18. crimped fibre according to claim 14 is characterized in that described polymers compositions is to can be used in cellulose, polyamide, polyester or the polypropylene of producing viscose and theirs is polymer-modified.
19., it is characterized in that described polymers compositions is to can be used in cellulose, polyamide, polyester or the polypropylene of producing viscose and theirs is polymer-modified according to each described crimped fibre of claim 15-17.
20. crimped fibre according to claim 18 is characterized in that described cellulose, polyamide, polyester or polypropylene and the polymer-modified of them that can be used in the production viscose is polycaprolactam, polyethylene terephthalate, polyethylene, polypropylene, polyvinyl chloride, polycaprolactam hexamethylene diamine, PBT, PTT or polymer-modified.
21. crimped fibre according to claim 19 is characterized in that described cellulose, polyamide, polyester or polypropylene and the polymer-modified of them that can be used in the production viscose is polycaprolactam, polyethylene terephthalate, polyethylene, polypropylene, polyvinyl chloride, polycaprolactam hexamethylene diamine, PBT, PTT or polymer-modified.
22. crimped fibre according to claim 14, the weight ratio that it is characterized in that first polymers compositions and second polymers compositions is 5/95-45/55.
23. according to each described crimped fibre of claim 15-18,20-21, the weight ratio that it is characterized in that first polymers compositions and second polymers compositions is 5/95-45/55.
24. crimped fibre according to claim 19, the weight ratio that it is characterized in that first polymers compositions and second polymers compositions is 5/95-45/55.
25. according to claim 22 or 24 described crimped fibres, the weight ratio that it is characterized in that first polymers compositions and second polymers compositions is 6/94-40/60.
26. crimped fibre according to claim 23, the weight ratio that it is characterized in that first polymers compositions and second polymers compositions is 6/94-40/60.
27. the preparation method of claim 1-3,5-6,8-10,12-13,15-18,20-22,24 and 26 any one described 3-D crimped fiber, it is characterized in that getting of the same race and polymer that molecular weight is different or two kinds similar polymers not, the ratio of control viscosity is greater than 1, with making blended slice after the mixing of second component employing parallel dual-screw extruding machine, use the spinning of bi-component spinning machine with first component then; First component, the second component raw material add screw extruder respectively, after spinning, drawing-off, typing, coiling operation, make the composite fibre that has three-dimensional crimp.
28. the preparation method of the described 3-D crimped fiber of claim 4, it is characterized in that getting of the same race and polymer that molecular weight is different or two kinds similar polymers not, the ratio of control viscosity is greater than 1, with making blended slice after the mixing of second component employing parallel dual-screw extruding machine, use the spinning of bi-component spinning machine with first component then; First component, the second component raw material add screw extruder respectively, after spinning, drawing-off, typing, coiling operation, make the composite fibre that has three-dimensional crimp.
29. the preparation method of the described 3-D crimped fiber of claim 7, it is characterized in that getting of the same race and polymer that molecular weight is different or two kinds similar polymers not, the ratio of control viscosity is greater than 1, with making blended slice after the mixing of second component employing parallel dual-screw extruding machine, use the spinning of bi-component spinning machine with first component then; First component, the second component raw material add screw extruder respectively, after spinning, drawing-off, typing, coiling operation, make the composite fibre that has three-dimensional crimp.
30. the preparation method of the described 3-D crimped fiber of claim 11, it is characterized in that getting of the same race and polymer that molecular weight is different or two kinds similar polymers not, the ratio of control viscosity is greater than 1, with making blended slice after the mixing of second component employing parallel dual-screw extruding machine, use the spinning of bi-component spinning machine with first component then; First component, the second component raw material add screw extruder respectively, after spinning, drawing-off, typing, coiling operation, make the composite fibre that has three-dimensional crimp.
31. the preparation method of the described 3-D crimped fiber of claim 14, it is characterized in that getting of the same race and polymer that molecular weight is different or two kinds similar polymers not, the ratio of control viscosity is greater than 1, with making blended slice after the mixing of second component employing parallel dual-screw extruding machine, use the spinning of bi-component spinning machine with first component then; First component, the second component raw material add screw extruder respectively, after spinning, drawing-off, typing, coiling operation, make the composite fibre that has three-dimensional crimp.
32. the preparation method of the described 3-D crimped fiber of claim 19, it is characterized in that getting of the same race and polymer that molecular weight is different or two kinds similar polymers not, the ratio of control viscosity is greater than 1, with making blended slice after the mixing of second component employing parallel dual-screw extruding machine, use the spinning of bi-component spinning machine with first component then; First component, the second component raw material add screw extruder respectively, after spinning, drawing-off, typing, coiling operation, make the composite fibre that has three-dimensional crimp.
33. the preparation method of the described 3-D crimped fiber of claim 23, it is characterized in that getting of the same race and polymer that molecular weight is different or two kinds similar polymers not, the ratio of control viscosity is greater than 1, with making blended slice after the mixing of second component employing parallel dual-screw extruding machine, use the spinning of bi-component spinning machine with first component then; First component, the second component raw material add screw extruder respectively, after spinning, drawing-off, typing, coiling operation, make the composite fibre that has three-dimensional crimp.
34. the preparation method of the described 3-D crimped fiber of claim 25, it is characterized in that getting of the same race and polymer that molecular weight is different or two kinds similar polymers not, the ratio of control viscosity is greater than 1, with making blended slice after the mixing of second component employing parallel dual-screw extruding machine, use the spinning of bi-component spinning machine with first component then; First component, the second component raw material add screw extruder respectively, after spinning, drawing-off, typing, coiling operation, make the composite fibre that has three-dimensional crimp.
35. preparation method according to claim 27 is characterized in that spinning body temperature is 200-300 ℃; Spinning speed be 200-4500 rice/minute; Drawing temperature is 40-160 ℃; Setting temperature is 60-230 ℃; Have the three-dimensional crimp performance after the drawing of fiber typing, its crimp percent is between 3-40%, and the melt thread does not have obvious elbow angle to occur in spinning process.
36., it is characterized in that spinning body temperature is 200-300 ℃ according to each described preparation method of claim 28-34; Spinning speed be 200-4500 rice/minute; Drawing temperature is 40-160 ℃; Setting temperature is 60-230 ℃; Have the three-dimensional crimp performance after the drawing of fiber typing, its crimp percent is between 3-40%, and the melt thread does not have obvious elbow angle to occur in spinning process.
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| CN101230498A (en) | 2008-07-30 |
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