CN104818538A - Ultra-coarse-denier flat nylon 6 filament and method for producing the same - Google Patents
Ultra-coarse-denier flat nylon 6 filament and method for producing the same Download PDFInfo
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- CN104818538A CN104818538A CN201510205406.8A CN201510205406A CN104818538A CN 104818538 A CN104818538 A CN 104818538A CN 201510205406 A CN201510205406 A CN 201510205406A CN 104818538 A CN104818538 A CN 104818538A
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Abstract
The invention discloses a method for producing an ultra-coarse-denier flat nylon 6 filament. The producing method comprises the following steps of cutting the nylon 6 into pieces and conveying into a screw for heating and melting, extruding fondants into a box through the screw (including static and dynamic mixers); placing the fondants into a spinneret assembly through a metering pump, mixing and filtrating through different-size metal sands and then extruding by spinneret orifices. Through a monomer pumping device, filament bundles extruded by the spinneret orifices are wound into a filament barrel after performing circular blowing cooling, bundling oiling, air interlacing jet, heating roller sizing. The aperture of each spinneret orifice is in the range of 1.5mm-5.0mm*0.15mm-0.40mm, and the orifice depth is in the range of 0.5mm-1.5mm; according to the producing method, the flatness of the fiber is in the range of 4.0-9.0. The production process is relatively steady, the produced ultra-coarse-denier flat nylon 6 filament is good in quality, and the flatness, breaking strength, breaking elongation and oil percentage of the filament can meet subsequent processing requirements, and thus the filament is a novel differential nylon 6 fiber with a high additional value.
Description
Technical field
The present invention relates to production of chemical fibre technical field, particularly the super thick denier polyamide fiber 6 flat filament production method of one and polyamide fibre 6 surpass coarse denier flat filament.
Background technology
Fibre in differentiation, because of its distinctive structural behaviour, just more and more causes the interest of people, also develops rapidly the research of the type fiber, and wherein profiled filament is one important in fibre in differentiation.In synthetic fiber forming process, the fiber with non-traditional circular cross section adopting special-shaped spinneret orifice (non-circular eyelet) to spin or doughnut are called profiled fibre, are called for short profiled filament.Profiled filament can improve wax-like sense and the gloss of circular wire, improves the coefficient of friction of fiber, increased fiber specific area thus overcome some intrinsic defect of synthetic fiber.Flat filament is the one in shaped filaments, has resistant and ANTIPILLING, is easier to dyeing, can give the welcome of the style of fabric uniqueness and excellent performance extremely consumer.Flatness weighs an important indicator of flat filament quality, refers to the length-width ratio of fibre section, and flatness is too large, and the fabric woven feels like jelly; Flatness is too little can reduce the flow velocity of melt in duct, easily makes single wire fracture, produces head, increases broken end and lousiness.The process conditions affecting product flatness mainly comprise the selection etc. of the specification of spinnerets, the design of spinning body temperature (spinning temperature) and control, the design of cooling condition and control, the design of spinning speed and control, gather position.How to select and to control above-mentioned process conditions most important to producing qualified heterotypic fibre.
Polyamide fibre has excellent physical property, and such as its intensity is high, ABRASION RESISTANCE good, regain is high, is widely used in the fields such as clothes (as knitted underwear, hosiery, sweat shirt, ski-wear, Lingerie etc.), industry, automobile, space flight.In recent years, nylon 6 fiber is also in constantly development and renewal, and wherein developing differential (flat) nylon-6 fiber becomes important trend.Wherein differential super coarse denier fiber is because intensity is high, elongation at break is low, fiber style is rough, the fields such as case and bag, lace, bunting, tent, sofa fabric, carpet, filter cloth, high strength sewing threads can be widely used in, but traditional polyamide fibre cross section is circle, circular configuration makes its hygroscopicity poor, flexible, and crease easily, limit it in high-end application of weaving in field and other industrial circles.And flat filament because of its specific area large, hygroscopicity makes moderate progress, and its rigidity increases, and anti-fluffing and anti-pilling ability also can significantly be improved, and therefore causes attention and the exploitation of insider.The production technology of current ultra-coarse denier polyester filament yarn (circular section) (CN101831718A), super thick dawn chinlon filament (circular section) (CN103184549A), super thick dawn viscose flat filament (imitative fiber crops) (CN101135067A) has been reported, but polyamide fibre surpasses coarse denier flat filament production aspect also exists technical bottleneck because of the aggregated structure characteristic of polyamide fibre, is not also applicable to the preparation method of super thick denier polyamide fiber 6 flat filaments.
The object of the invention is the technical bottleneck in order to solve super thick dawn polyamide fibre flat filament and a kind of manufacture method with the super thick denier polyamide fiber 6 flat filament of the performances such as excellent bulkiness, resistance to soiling, ANTIPILLING, hygroscopicity and easy dyeing is provided.In order to achieve the above object, the super coarse denier flat filament designed by the present invention, its filament number is 8.0dtex ~ 16dtex.Flatness is 4.0 ~ 9.0.
Summary of the invention
The object of the invention is the manufacture method providing a kind of super thick denier polyamide fiber 6 flat filament, current super thick dawn chinlon filament (circular cross-section) process conditions are suitably improved, in conjunction with technological development and the knowhow (correlation technique has applied for patent of invention CN102161755B, CN102161756B, CN102199283B, CN 102167814B, CN102206338B, CN102181052B etc.) of inventor's long campaigns thin dawn, super fine denier nylon-6 fiber, develop the super thick denier polyamide fiber 6 flat filament product of road user requirement, function admirable after meeting.In order to realize foregoing invention object, the technical solution used in the present invention is as follows:
A production method for super thick denier polyamide fiber 6 flat filament, it is characterized in that, described production method comprises the steps:
(1) nylon 6 slice of drying is sent into screw rod heating and melting, melt is squeezed into casing through screw rod (interior containing static, dynamic mixer); It is characterized by 230 ~ 280 DEG C, be preferably 240 ~ 270 DEG C, be more preferably 255 ~ 265 DEG C, spinning (casing) temperature is 245 ~ 275 DEG C, is preferably 250 ~ 270 DEG C, is more preferably 255 ~ 262 DEG C.
(2) melt enters spinning pack through measuring pump again, filters, extrude through spinneret orifice through different thicknesses metal sand proportioning.Thick extra large sand size is 40 order ~ 70 orders, and thin extra large sand size is 80 order ~ 120 orders, and coarse sand and fine sand proportioning ensure that the melt initial pressure of filament spinning component is at 15 ~ 18Mpa, and general proportioning is 1.5 ~ 3; Spinneret orifice on described spinnerets (plate face internal diameter 75mm) is of a size of " one " font, its mesopore cross section 1.5mm ~ 5.0mm × 0.15mm ~ 0.40mm, hole depth 0.5mm ~ 1.5mm, spinneret orifice number 6 ~ 24.
(3) tow extruded of spinneret orifice through monomer pumping device, ring blowing device, boundling oils, hot-rolling is shaped, the nozzle of interlace, be wound into silk cylinder.
In step (1), described screw rod melt temperature and spinning temperature, because filament number is up to more than 8dtex, melt is difficult to quick cooling, so need reduce the temperature difference of spinning temperature and environment temperature, namely needs suitably to reduce spinning temperature.But melt viscosity will raise to some extent after spinning temperature reduces.So spinning temperature is preferably 255 ~ 262 DEG C.In step (2), because spinning temperature is lower, melt viscosity is comparatively large, needs suitably to improve the ratio of thickness sea sand in assembly, ensures that the melt initial pressure of filament spinning component is at 15 ~ 18Mpa; And due to melt viscosity larger, melt goes out the elastic memory after spinneret orifice to be strengthened, extrusion swelling effect can be caused more obvious, in order to can spinning carry out smoothly, also diameter and the draw ratio of spinneret orifice must relatively be increased, to relax the effect that swells of melt, spinneret orifice diameter is preferably 1.5mm ~ 5.0mm × 0.15mm ~ 0.40mm for this reason, hole depth 0.5mm ~ 1.5mm.In step (3), described ring quenching, is characterized by inner ring and blows, and the bar that better can control fiber is done, to make that tow cooling is even, bar do homogeneous, dyeability good; Because filament number is up to more than 8dtex, melt is difficult to quick cooling, conventional air regulator cooling length can not meet super thick dawn extrusion spinning demand: strengthen cooling wind speed if one-sided, reduce wind-warm syndrome, can, internal cooling fast because of thick dawn nylon fibre surface cool and produce skin-core structure, cause the series of problems such as ribbon is dry, dyeing.Therefore, on boundling oil drop choose particularly crucial.Oil drop on boundling is displaced downwardly between winding by this patent, the boundling point distance that namely oils spinnerets 120cm ~ 200cm; And fiber is comparatively thick, need strengthen oil concentration, reduces friction and cause fiber surface to damage.Therefore, quench air velocity is preferably 0.5 ~ 1.0m/s by this patent, and ring blowing temperature is preferably 15 ~ 19 DEG C, and humidity control is preferably 75% ~ 90%.Further, the hot-rolling sizing described in step (3), it is characterized by tow and enter the nozzle of interlace through the 3rd deflector roll again through first, second hot-rolling drawing-off, sizing, first, second heat roller temperature is respectively 60 ~ 90 DEG C, 145 ~ 185 DEG C.Further, draw ratio is 1.10 ~ 1.35.Further, described coiling and molding, it is characterized by winding speed is 3500 ~ 4700m/min.Further, the polyamide fibre that described super thick denier polyamide fiber 6 flat filament production method is produced 6 surpasses coarse denier flat filament product, and the filament number that it is characterized by fiber is 8dtex ~ 16dtex; The flatness of fiber is 4.0 ~ 9.0; The bar evenness of fiber is 1.0 ~ 2.0%; Fibrous fracture intensity is 3.8 ~ 5.0cN/dtex; Elongation at break is 25% ~ 40%.
The present invention compared with prior art, has the following advantages:
1. the super thick denier polyamide fiber 6 flat filament of super thick denier polyamide fiber 6 flat filament production method production, stable production process, product quality is high, and the flatness, fracture strength, elongation at break, oil content etc. of product all can meet rear road processing request;
2. production method of the present invention is easy, compensate for the deficiency of domestic super thick denier polyamide fiber 6 flat filaments production technology, improves scientific and technological content and the added value of China's polyamide fibre 6 fibre in differentiation product.
Accompanying drawing explanation
Fig. 1 is production process route figure of the present invention.
Detailed description of the invention
Below in conjunction with embodiment, further illustrate content of the present invention.Should be appreciated that enforcement of the present invention is not limited to the following examples, any pro forma accommodation make the present invention and/or change all will fall into scope.In the present invention, if not refer in particular to, all equipment and raw material etc. all can be buied from market or the industry is conventional.Method in following embodiment, if no special instructions, is the conventional method of this area.
The raw materials for production of the embodiment of the present invention are nylon 6 slice resin, and inherent viscosity is 2.47 ± 0.02, and main production equipments is applicant's existing chinlon filament high speed spinning production line (winding head is that Japanese TMT produces).
Embodiment 1
As shown in Figure 1: dried 6 section resins are carried out melt spinning, intrinsic viscosity 2.48, fusing point 219 DEG C, delivers to casing after being extruded by screw extruder by nylon 6 slice molten mass, through measuring pump, molten mass is quantitatively pressed into filament spinning component.Wherein, melt is 257 DEG C, 262 DEG C, 262 DEG C, 262 DEG C in the temperature in screw extruder Zhong Ge district respectively, and spinning temperature is 262 DEG C; Filament spinning component thickness metal sand proportioning is 1.5, spinneret hole cross section 1.5mm × 0.17mm, hole depth 0.8mm, hole count is 24, by the spinneret orifice on spinnerets, nylon 6 melt is extruded with filament state, then through monomer suction, enter the cooling of interior quench device, quench air velocity degree is 0.6m/s, and cooling air temperature controls at 19 DEG C, and humid control is 75%.Rear tow oils through two roads boundling, and boundling point distance spinnerets 135cm, oil concentration 10%, enters winding head coiling and molding by the first hot-rolling, the second hot-rolling and the 3rd godet roller through the nozzle of interlace and obtain super thick dawn polyamide fibre 18 flat filaments product.Wherein, the first heat roller temperature 60 DEG C, the second heat roller temperature 160 DEG C, draw ratio 1.10; Winding speed is 4700m/min.After tested, the super thick denier polyamide fiber 6 flat fiber filament number of gained is 16.0dtex, and the flatness of fiber is 6.0; The bar evenness of fiber is 1.21%; Fibrous fracture intensity is 4.1cN/dtex; Elongation at break is 32%.
Embodiment 2
As shown in Figure 1: dried 6 section resins are carried out melt spinning, intrinsic viscosity 2.47, fusing point 218 DEG C, delivers to casing after being extruded by screw extruder by nylon 6 slice molten mass, through measuring pump, molten mass is quantitatively pressed into filament spinning component.Wherein, melt is 256 DEG C, 259 DEG C, 259 DEG C, 259 DEG C in the temperature in screw extruder Zhong Ge district respectively, and spinning temperature is 259 DEG C; Filament spinning component thickness metal sand proportioning is 1.8, spinneret hole cross section 2.0mm × 0.20mm, hole depth 0.8mm, hole count is 18, by the spinneret orifice on spinnerets, nylon 6 melt is extruded with filament state, then through monomer suction, enter the cooling of interior quench device, quench air velocity degree is 0.6m/s, and cooling air temperature controls at 18 DEG C, and humid control is 80%.Rear tow oils through two roads boundling, and boundling point distance spinnerets 145cm, oil concentration 11%, enters winding head coiling and molding by the first hot-rolling, the second hot-rolling and the 3rd godet roller through the nozzle of interlace and obtain super thick denier polyamide fiber 6 flat filaments product.Wherein, the first heat roller temperature 70 DEG C, the second heat roller temperature 165 DEG C, draw ratio 1.18; Winding speed is 4500m/min.After tested, the super thick denier polyamide fiber 6 flat fiber filament number of gained is 12.0dtex, and the flatness of fiber is 8.0; The bar evenness of fiber is 1.38%; Fibrous fracture intensity is 4.2cN/dtex; Elongation at break is 30%.
Embodiment 3
As shown in Figure 1: dried 6 section resins are carried out melt spinning, intrinsic viscosity 2.47, fusing point 218 DEG C, delivers to casing after being extruded by screw extruder by nylon 6 slice molten mass, through measuring pump, molten mass is quantitatively pressed into filament spinning component.Wherein, melt is 254 DEG C, 257 DEG C, 257 DEG C, 257 DEG C in the temperature in screw extruder Zhong Ge district respectively, and spinning temperature is 257 DEG C; Filament spinning component thickness metal sand proportioning is 2.3, spinneret hole cross section 3.0mm × 0.30mm, hole depth 2.0mm, hole count is 12, by the spinneret orifice on spinnerets, nylon 6 melt is extruded with filament state, then through monomer suction, enter the cooling of interior quench device, quench air velocity degree is 0.7m/s, and cooling air temperature controls at 17 DEG C, and humid control is 80%.Rear tow oils through two roads boundling, and boundling point distance spinnerets 170cm, oil concentration 13%, enters winding head coiling and molding by the first hot-rolling, the second hot-rolling and the 3rd godet roller through the nozzle of interlace and obtain super thick denier polyamide fiber 6 flat filaments product.Wherein, the first heat roller temperature 80 DEG C, the second heat roller temperature 170 DEG C, draw ratio 1.23; Winding speed is 4500m/min.After tested, the super thick denier polyamide fiber 6 flat fiber filament number of gained is 10.0dtex, and the flatness of fiber is 7.5; The bar evenness of fiber is 1.53%; Fibrous fracture intensity is 4.3cN/dtex; Elongation at break is 29%.
Embodiment 4
As shown in Figure 1: dried 6 section resins are carried out melt spinning, intrinsic viscosity 2.47, fusing point 218 DEG C, delivers to casing after being extruded by screw extruder by nylon 6 slice molten mass, through measuring pump, molten mass is quantitatively pressed into filament spinning component.Wherein, melt is 252 DEG C, 256 DEG C, 256 DEG C, 255 DEG C in the temperature in screw extruder Zhong Ge district respectively, and spinning temperature is 255 DEG C; Filament spinning component thickness metal sand proportioning is 2.8, spinneret hole cross section 4.0mm × 0.40mm, hole depth 1.0mm, hole count is 6, by the spinneret orifice on spinnerets, nylon 6 melt is extruded with filament state, then through monomer suction, enter the cooling of interior quench device, quench air velocity degree is 0.8m/s, and cooling air temperature controls at 16 DEG C, and humid control is 85%.Rear tow oils through two roads boundling, and boundling point distance spinnerets 190cm, oil concentration 14%, enters winding head coiling and molding by the first hot-rolling, the second hot-rolling and the 3rd godet roller through the nozzle of interlace and obtain super thick denier polyamide fiber 6 flat filaments product.Wherein, the first heat roller temperature 85 DEG C, the second heat roller temperature 175 DEG C, draw ratio 1.28; Winding speed is 4400m/min.After tested, the super thick denier polyamide fiber 6 flat fiber filament number of gained is 8.0dtex, and the flatness of fiber is 7.0; The bar evenness of fiber is 1.81%; Fibrous fracture intensity is 4.5cN/dtex; Elongation at break is 28%.
Claims (9)
1. a production method for super thick denier polyamide fiber 6 flat filament, it is characterized in that, described production method comprises the steps:
(1) dry nylon 6 slice; Nylon 6 slice is sent into screw rod heating and melting, the mixture melt of melting is squeezed into casing through screw rod (interior containing static, dynamic mixer);
(2) melt enters spinning pack through measuring pump again, and through different thicknesses sea, sand proportioning is filtered, and extrudes through spinneret orifice.
(3) tow extruded of spinneret orifice through monomer pumping device, ring blowing device, boundling oils, hot-rolling is shaped, the nozzle of interlace, be wound into silk cylinder.
2. screw rod melt temperature as claimed in claim 1, is characterized by 230 ~ 280 DEG C, is preferably 240 ~ 270 DEG C, be more preferably 255 ~ 265 DEG C, spinning (casing) temperature is 245 ~ 275 DEG C, is preferably 250 ~ 270 DEG C, is more preferably 255 ~ 262 DEG C.
3. filament spinning component as claimed in claim 1, it is characterized by described thick extra large sand size is 40 order ~ 70 orders, and thin extra large sand size is 80 order ~ 120 orders, and coarse sand and fine sand proportioning ensure that the melt initial pressure of filament spinning component is at 15 ~ 18Mpa, and general proportioning is 1.5 ~ 3; Spinneret orifice on described spinnerets (plate face internal diameter 75mm) is of a size of " one " font, its mesopore cross section 1.5mm ~ 5.0mm × 0.15mm ~ 0.40mm, hole depth 0.5mm ~ 1.5mm spinneret orifice number 8 ~ 24.
4. monomer pumping device as claimed in claim 1, is characterized by, and during nylon 6 spinning, easily decomposes and produces caprolactam monomer or oligomer, if remove not in time, dry and irregularity can have an impact, therefore need to add monomer pumping device to ribbon.
5. ring quenching as claimed in claim 1, it is characterized by inner ring and blow, quench air velocity is 0.5 ~ 1.0m/s, and cooling air temperature controls at 15 ~ 19 DEG C, and humid control is 75% ~ 90%.
6. boundling as claimed in claim 1 oils, and it is characterized by two roads and oils, wherein oil nozzle distance spinnerets 120cm ~ 200cm, and described oil concentration is the intermediate water emulsion of 10% ~ 15% oil content.
7. hot-rolling sizing as claimed in claim 1, it is characterized by tow and enter the nozzle of interlace through the 3rd deflector roll again through first, second hot-rolling drawing-off, sizing, first, second heat roller temperature is respectively 75 ~ 95 DEG C, 155 ~ 185 DEG C.Draw ratio is 1.6 ~ 2.2.
8. coiling and molding as claimed in claim 1, it is characterized by winding speed is 4000 ~ 4700m/min.
9. the polyamide fibre that the super thick denier polyamide fiber 6 flat filament production method as described in any one of claim 1-9 is produced 6 surpasses coarse denier flat filament, and the filament number that it is characterized by fiber is 8.0dtex ~ 16dtex; The flatness of fiber is 4.0 ~ 9.0; The bar evenness of fiber is 1.0 ~ 2.0%; Fibrous fracture intensity is 3.8 ~ 5.0cN/dtex; Elongation at break is 25% ~ 40%.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105350097A (en) * | 2015-09-30 | 2016-02-24 | 海盐海利环保纤维有限公司 | Method for producing ultra-coarse denier flat recycled polyester filaments by the use of recycled polyester bottle flakes |
| CN105442071A (en) * | 2016-01-06 | 2016-03-30 | 长乐力恒锦纶科技有限公司 | Imitation rabbit hair chinlon 6 fiber and production method of imitation rabbit hair chinlon 6 fiber |
| CN106978636A (en) * | 2016-08-31 | 2017-07-25 | 浙江金旗新材料科技有限公司 | A kind of warming high oriented yarn of wear-resisting type polyamide fibre 6 |
| CN113481638A (en) * | 2021-07-05 | 2021-10-08 | 义乌华鼎锦纶股份有限公司 | Preparation method of nylon wool-like yarn with crystal fine glittering luster |
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| CN105350097A (en) * | 2015-09-30 | 2016-02-24 | 海盐海利环保纤维有限公司 | Method for producing ultra-coarse denier flat recycled polyester filaments by the use of recycled polyester bottle flakes |
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| CN106978636A (en) * | 2016-08-31 | 2017-07-25 | 浙江金旗新材料科技有限公司 | A kind of warming high oriented yarn of wear-resisting type polyamide fibre 6 |
| CN113481638A (en) * | 2021-07-05 | 2021-10-08 | 义乌华鼎锦纶股份有限公司 | Preparation method of nylon wool-like yarn with crystal fine glittering luster |
| CN113481638B (en) * | 2021-07-05 | 2023-01-24 | 义乌华鼎锦纶股份有限公司 | Preparation method of nylon wool-like yarn with crystal fine glittering luster |
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