Summary of the invention
The objective of the invention is in order to solve the deficiency that prior art exists; Through transforming FDY device fabrication and adjustment production technology; Provide a kind of and have the superelevation extension property, be prone to dye level dyeing, evenly dye-uptake and high-color rendering, the fine denier polyamide fiber 6 pre-oriented yarn of functionalization porous that pliability is good, and technology and equipment.
In order to achieve the above object, the technical scheme of the present invention's employing is: provide a kind of porous fine denier polyamide fiber 6 pre-oriented yarn, specification is 75dtex/144f~110dtex/144f; It comprises that mass fraction is 0.5~5.0% additive; Described additive is methacrylate, maleic anhydride and the benzene nanometer randomcopolymer of alkene, and by weight percentage, the content of methacrylate is 75~85%; The content of maleic anhydride is 10~12%, and all the other are benzene alkene; The fracture strength of pre-oriented yarn is 3.45 ± 0.25 cN/dex, and elongation at break is 80 ± 20 %.
A kind of equipment for preparing the fine denier polyamide fiber 6 pre-oriented yarn of porous of the present invention; Based on the FDY equipment of producing conventional variety; Comprise preparatory crystallization, drying, screw rod melt extruded device; Spinning manifold, measuring pump, filament spinning component, spinnerets device for spinning, cooling curing device and coiling and forming device; The additive injector is installed on the charging aperture of said screw rod melt extruded device; Described cooling curing device is Xu Lenghe ring blowing cooling; The Xu Leng heater is installed below spinnerets, and the heating region height is 100~120mm; The below installing ring cold wind blower of Xu Leng heater; The boundling oil frame that oils is installed in the below of ring cold wind blower, and the distance of leaving spinnerets is 800 ± 50 mm places; Coiling and forming device comprises first, second godet roller, preparatory Network device and up-coiler, and described preparatory Network device places the centre of first godet roller and second godet roller.
A kind of method for preparing the fine denier polyamide fiber 6 pre-oriented yarn of porous of the present invention comprises that chip drying, melt extruded, melt are extruded, cooling curing, oil nozzle oils and the winding shaping operation, and process conditions are following:
1, in chinlon 6 section, adding mass fraction is 0.5~5.0% additive; Described additive is methacrylate, maleic anhydride and the benzene nanometer randomcopolymer of alkene; By weight percentage; The content of methacrylate is 75~85%, and the content of maleic anhydride is 10~12%, and all the other are benzene alkene;
2, section is adopted 5 grades of screw rod melt extrusion processes with after additive fully mixes in screw rod, and the temperature of 5 grades of screw rods is respectively 248 ± 2 ℃, 258 ± 2 ℃, 260 ± 2 ℃, 259 ± 2 ℃ and 259 ± 2 ℃;
3, melt adopts Xu Lenghe ring blowing process for cooling solidify out into strand after spinnerets is extruded as the melt thread; The heating-up temperature of Xu's device for cooling is 230 ± 2 ℃; The process conditions of ring blowing are: pressure 550Pa, 21 ± 2 ℃ of wind-warm syndrome, humidity 90 ± 5%, wind speed 0.40~0.50 m/s;
4, the tow input speed after nozzle oils boundling is first godet roller of 3945~4455 m/min; Through pressure is after the preparatory Network device of 0.7 ± 0.05 bar carries out preparatory network; Admission velocity is second godet roller of 4050~4565 m/min again, and godet roller is cold roller; Winding speed with 4000~4500 m/mi carries out coiling and molding, and processing specification is the fine denier polyamide fiber 6 pre-oriented yarn of the porous spinning cake of 75dtex/144f~110dtex/144f.
Principle of the present invention is: adopt conventional polyamide 6 (polyamide fibre 6) raw material; In raw material, add additive; It is distributed in polyamide 6 (polyamide fibre 6) melt even and finely; The effect that is produced is: the regularity that molecular structure is arranged in order in the fiber is destroyed in (1), reduces the macromolecular degree of orientation and degree of crystallinity; (2) on polyamide 6 (polyamide fibre 6) strand, orientation and crystallization are formed steric hindrance; Under high speed spinning speed, obtain the supramolecular structure of low crystalline rate and low rate of orientation; Make that the development of fiber orientation and crystallization is effectively suppressed on the high-speed spinning silk thread, can control orientation, the degree of crystallinity of spinning Cheng Yingli and fiber; (3) in fibroplastic process, form micro-fiber structure, make these microfibers partly absorb the unnecessary Cheng Yingli that spins under the high winding speed, thereby make orientation and crystallization under high winding speed obtain inhibition.With this understanding; Adopt suitable spinning and stretch forming process conditions, in fibroplastic process, form microfiber, the microfiber that is added partly absorbs the unnecessary Cheng Yingli that spins under the high winding speed; Simultaneously; Stress in polyamide 6 (polyamide fibre 6) matrix reduces effectively, and therefore, orientation and crystallization under high winding speed have obtained inhibition through additive.In technical scheme of the present invention; Can adjust and control the supramolecular structure of crystallization in the process, orientation according to the addition of additive; Adopt reasonable process conditions, thin dawn of functionalization, micro denier, the ultra-fine denier polyamide fiber 6 series of products of function admirables such as realizing obtaining to have the superelevation extension property, be prone to dye level dyeing, evenly dye-uptake and high-color rendering, pliability be good.
Compared with prior art, the invention has the beneficial effects as follows:
1, the present invention has selected a kind of efficient, polymeric additive at a low price; Adopt and reasonably add speed and optimum addition; Improve device and relevant manufacturing condition, controlled the supramolecular structure of aggregated structure adjustment in the spinneret draft forming process, high order orientation and crystallization effectively; Simultaneously,, further improve melt mixed uniformity and pressure stability, effectively adjust and control the coiling tensile stress and the bar of strand and do inhomogeneous rate, improve the after-drawing performance of the fine denier polyamide fiber 6 POY of porous through transforming the FDY device fabrication.
3, the present invention has rationally utilized existing FDY device resource; Flexibility design and the best process conditions of choose reasonable through the Silk Road adjustment; Produce the 75dtex/144f~fine denier polyamide fiber 6 pre-oriented yarn of 110dtex/144f porous product; Have that production cost is low, output is high, produce control, the characteristics such as good product quality, added value height of being easy to.The product specific area that provides is higher; Its fiber construct has the capillary core sucting action and forms the suction wet guiding function, has the silk of superelevation emulation preferably effect, make that its fabric has that moisture absorption is ventilative, washing shrinkage low, painted strong, folding property is good, rotproofness is strong, the plentiful softness of sense of touch, quick-drying washable, non-ironing, premium properties such as drapability is good, comfortableness is good.
The specific embodiment
Below in conjunction with embodiment technical scheme of the present invention is done further to describe.
Embodiment 1
Present embodiment provides a kind of 75dtex/144f porous fine denier polyamide fiber 6 pre-oriented yarn.It is based on the FDY equipment of producing conventional variety; Comprise preparatory crystallization, drying, screw rod melt extruded device; The additive injector is installed on the charging aperture of screw rod melt extruded device; Spinning manifold, measuring pump, filament spinning component, spinnerets device for spinning are installed the Xu Leng heater below spinnerets, the heating region height is 100~120mm; The below installing ring cold wind blower of Xu Leng heater; The boundling oil frame that oils is installed in the below of ring cold wind blower, and the distance of leaving spinnerets is 800 ± 50 mm places; Coiling and forming device comprises first, second godet roller, preparatory Network device and up-coiler, and described preparatory Network device places the centre of first godet roller and second godet roller.
Production technology and condition are following:
The chinlon 6 section relative viscosity is 2.70~3.10, and relative molecular weight is 16000~18000, cuts into slices 145 ℃ of following preparatory crystallizations about 30 minutes; Delivered to the drying tower inner drying 6~8 hours, baking temperature is 155 ℃, guarantees that the section moisture content is less than 30ppm; Dried polyamide fibre 6 is done section and is got into screw rod, and the adding mass fraction is 0.5% additive in chinlon 6 section, and described additive is methacrylate, maleic anhydride and the benzene nanometer randomcopolymer of alkene; By weight percentage; The content of methacrylate is 75%, and the content of maleic anhydride is 10%, and all the other are benzene alkene; Section is with after additive fully mixes in screw rod; Adopt 5 grades of screw rod melt extrusion processes, heating and melting gets into spinning manifold after mixing, measure, filtering; Be extruded as the melt thread through measuring pump, filament spinning component, spinnerets; Become strand through Xu Leng and at ring blowing cooling air set, be drawn to first godet roller through oil boundling, spinning shaft of nozzle then, carry out then being drawn to second godet roller again behind the preparatory network; Carry out coiling and molding with 4000m/min speed through coiler device, process the fine denier polyamide fiber 6 pre-oriented yarn of 75dtex/144f porous (POY) spinning cake.
The fine denier polyamide fiber 6 pre-oriented yarn of 75dtex/144f porous technological parameter is seen table 1; The fine denier polyamide fiber 6 POY of 75dtex/144f porous performance is seen table 2.
Table 1
Table 2
Performance |
Product index |
Outward appearance/excellent rate |
≥98% |
Line density (dtex) |
75~110 |
The line density coefficient of variation (%) |
1.50~1.90 |
Fracture strength (cN/dex) |
3.45±0.25 |
Elongation at break (%) |
80±20 |
Oil content (%) |
0.57±0.03 |
Bar evenness |
0.85±0.05 |
In the FDY of routine technological process, polyamide fibre 6 (PA6) section is sent into screw rod fusion, compression and homogenising after crystallization in advance, drying; Get into spinning manifold; Be extruded as the melt thread through measuring pump, filament spinning component, spinnerets, and become strand, after nozzle oils boundling, leave spinning shaft at constant temperature, the constant humidity lateral blowing cooling air set of shock chamber; After Network device carries out preparatory network in advance; Be drawn to the first normal temperature drawing roller roller and the second normal temperature drawing roller roller stretches, carry out HEAT SETTING through the 3rd hot-rolling, input hands over the network nozzle to hand over network again; Carry out coiling and molding with 4200 m/min speed through coiler device then, process the fine denier polyamide fiber 6 fullly drawn yarn (FDY) of 100Den/144f porous.In the present invention; After conventional FDY scrap build, the technological process of producing POY is: the melt thread that spinnerets is extruded, adopt Xu Lenghe ring blowing cooled and solidified to become strand;, nozzle leaves spinning shaft after oiling boundling; Again tow is imported the first cold godet roller, after Network device carries out preparatory network in advance, get into the second cold godet roller; Carry out coiling and molding with 4000m/mi~4500 m/mi winding speeds again, process the fine denier polyamide fiber 6 pre-oriented yarn of 75dtex/144f~110dtex/144f porous (POY) spinning cake.
With conventional FDY apparatus in comparison; The melt thread that the present invention extrudes spinnerets in the former FDY equipment is through constant temperature, the constant humidity lateral blowing process for cooling of shock chamber; Change Xu Lenghe ring blowing cooling into, the location-appropriate ground that melt is solidified moves down, the cooling length of increase strand; Delay, control macromolecular orientation and crystallization, help wire strip forming; Adopt ring blowing process for cooling, improved the uniformity of cooling, overcome tow easy defective that forms skin-core structure in high-speed motion.Simultaneously; The present invention also makes first, second normal temperature drawing roller into the first cold godet roller and the second cold godet roller; And change the preparatory Network device before the first normal temperature drawing roller roller among the FDY and be placed between first, second cold godet roller; Cancel the 3rd hot-rolling, divide roll dies and hand over the network nozzle, and the speed of coiler device is made into to carry out coiling and molding with 4000m/mi~4500 m/mi winding speeds, process the fine denier polyamide fiber 6 pre-oriented yarn of 75dtex/144f~110dtex/144f porous (POY) spinning cake.Utilizing existing FDY production equipment, not only can produce FDY but also can produce the POY product, is the FDY production equipment with product flexibilityization; And through the flexibility design of the Silk Road adjustment and the process conditions of choose reasonable the best; The fine denier polyamide fiber 6 pre-oriented yarn of a kind of novel porous preparation technology is provided, and this production technology is simple, and is with low cost; The fine denier polyamide fiber 6 POY of the porous of being produced product has stable performance; It is good with colouring property that bar is done uniformity, flexible operation, characteristics such as added value height; Produce the fine denier polyamide fiber 6 pre-oriented yarn of 75dtex/144f~110dtex/144f porous by technical scheme provided by the invention, can reach the maximization of company interest.