CN102517680A - Multi-hole superfine denier polyamide 6 POY/FDY interlacing composite fiber, its preparation method and its device - Google Patents
Multi-hole superfine denier polyamide 6 POY/FDY interlacing composite fiber, its preparation method and its device Download PDFInfo
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Abstract
The invention discloses a multi-hole superfine denier polyamide 6 POY/FDY interlacing composite fiber, its preparation method and its device. The invention is characterized in that a current FDY production device is used, a raw material polyamide 6 is sliced and dried, an additive is on-line added, the sliced polyamide 6 is subjected to screw extrusion and melt extrusion, strand which is subjected to annealing and circular-blow wind cooling solidification is divided in to two beams, one beam of the strand is subjected to oiling, pre-networking, stretching and thermosetting to obtain FDY; another beam of the strand is subjected to oiling and then is input to a first godet roller, and then subjected to pre-networking and input to a second godet roller to obtain POY, then simultaneously input in an interlacing nozzle for compositing, a process of winding formation is carried out to prepare the multi-hole superfine denier polyamide 6 POY/FDY interlacing composite fiber. According to the fiber molecular structure performance design and the fiber form control, a process optimization scheme is determined to obtain the composite silk fiber with differential linear density, differential elongation and differential shrinkage, the fiber has the advantages of moisture absorption, breathability, good drapability, high color rendering, good comfortableness and the like.
Description
Technical field
The present invention relates to a kind of porous superfine denier polyamide 6 POY/FDY intermingled composite fibers, preparation method, and equipment, the chemical fibre technical field belonged to.
Background technology
Porous superfine denier polyamide 6 POY/FDY composite fibres are that a kind of other fiber by sub-thread or multiply polyamide 6 fine denier filament and different size, different cultivars or same breed, same size enters into texturing jet through the overfeeding mode; Compound friendship network distortion under the effect of hypersonic air flow; Produce and shrink and looped pile the formed ultra simulative fiber of the yarn of intermeshing zone circle circle.This composite fibre have the upright configuration attitude of fine structure, interfibrous fine space, space three-dimensional that the specialty fibers crowd forms, sandwich construction and with the natural fabric similar in appearance.Compare with general fiber; Its sense of touch is more soft, resilience is better; And can overcome natural fabric and be prone to wrinkle, the air-locked shortcoming of artificial fibre; Fiber also is being significantly improved aspect spreadability, bulkiness and the warmth retention property in addition, can give the ultra well-pressed soft feeling of fabric, natural sense, glutinous and new styles such as dry feeling.Some performance surmounts natural fabric, and added value is high, therefore is widely used in chemical fibre market, middle and high end.
At present, the production technology of preparation porous superfine denier polyamide 6 POY/FDY composite fibres generally adopts two step method production Technology route: adopt the production process of melt-spun UDY-DT, POY or FDY earlier, hand over network compound POY and DT or FDY again.The technological process of conventional two-step method is long, and manufacturing procedure is complicated, relatively poor, the poor product quality of dyeability and effect, and production cost is high, and efficient is low.
Summary of the invention
The present invention is intended to overcome many deficiencies of the technology method existence of two step method production porous superfine denier polyamide 6 POY/FDY intermingled composite fiber in the prior art; Provide that a kind of production cost is low, output is high, good product quality, added value are high, production Technology is easy to regulation and control and can rationally utilizes existing FDY device resource; Produce the porous superfine denier polyamide 6 POY/FDY intermingled composite fibers of iso-fineness, different elongation and different contraction, preparation method and equipment.
In order to achieve the above object, the technical scheme of the present invention's employing is: a kind of porous superfine denier polyamide 6 POY/FDY intermingled composite fibers are provided, and specification is 66dtex/136f～88dtex/136f; 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.
A kind of equipment for preparing described porous superfine denier polyamide 6 POY/FDY intermingled composite fibers; 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, oiling 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; Described oiling device, its 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; Described coiling and forming device comprises that POY is shaped, FDY is shaped, hands over network nozzle and up-coiler.
Described POY is shaped and comprises first, second godet roller and preparatory Network device, and Network device places the centre of first godet roller and second godet roller in advance.
Described FDY winding shaping comprises first, second and the 3rd drawing roller, in advance Network device and Network device.
A kind of method for preparing described porous superfine denier polyamide 6 POY/FDY intermingled composite fibers comprises that chip drying, melt extruded, melt are extruded, cooling curing, oil nozzle oils and the winding shaping operation; Described melt extruded operation adds mass fraction and is 0.5～5.0% additive in polyamide 6 section, section is with after additive fully mixes; Adopt 5 grades of screw rod melt extrusion processes, the temperature of 5 grades of screw rods is respectively 249 ± 2 ℃, 259 ± 2 ℃; 262 ± 2 ℃, 260 ± 2 ℃ and 259 ± 2 ℃; Described additive is methacrylate, maleic anhydride and the benzene nanometer randomcopolymer of alkene, and 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; Described cooling curing operation is Xu Lenghe ring blowing cooling; The heating-up temperature of Xu Leng is 230 ± 2 ℃; The process conditions of ring blowing are: pressure 490Pa, 22 ℃ ± 2 ℃ of wind-warm syndrome, humidity 90% ± 5%, wind speed 0.40 m/s～0.50 m/s; Strand behind the cooling curing is divided into two bundles, a branch of through oiling, obtaining FDY after network, stretching and the HEAT SETTING in advance; Be input to second godet roller again after being input to first godet roller after another Shu Jing oils and carrying out preparatory network, obtain POY, again they are imported simultaneously that to hand over the network nozzle to carry out compound,, make porous superfine denier polyamide 6 POY/FDY intermingled composite fibers through coiling and molding.
The preparation technology of described POY is: the tow input speed after oil nozzle oils is first godet roller of 3895～4400 m/min; Through pressure is after the preparatory Network device of 0.75 ± 0.05 bar carries out preparatory network; Admission velocity is second godet roller of 4000～4500 m/min again, and godet roller is cold roller.
The preparation technology of described FDY is: the tow after nozzle oils boundling is imported preparatory network; Network pressure is 0.75 ± 0.05 bar in advance; Be drawn to the first normal temperature drawing roller again and the second normal temperature drawing roller stretches, their speed is respectively 3495～3980 m/min and 4050～4560 m/min; Carry out HEAT SETTING through the 3rd hot-rolling, its temperature is 135～155 ℃, and speed is 4010～4515 m/mi; Input pressure is the master network of 3 ± 0.05 bar again.
Described coiling and molding, its winding speed are 4000～4500 m/mi.
Compared with prior art, remarkable result of the present invention is:
1, adopts online adding additive; Through molecular structure modification, blend, abnormal shape, ultra-fine, complex technique, provide special, super fine denier, moisture absorption to have a good sweat, lead wet standardization, fibre in differentiation kind; Improve the fiber combination property; The spinnability, stainability, the comfortableness that surmount natural fabric are produced high-quality, high added value, have realized difference functionalization cheaply.
2, adopt online formed composite technology; Through means such as fibrous molecular structure performance design and fibre morphology controls; Confirm the process optimization scheme; Implement the complex machining process technology of different size, different cultivars or same breed, same size, different structure performance polyamide fibre 6; Obtain the compound silk fiber of iso-fineness, different elongation and different contraction, and fiber construct has by the capillary core sucting action and forms the suction wet guiding function, premium properties such as make that its fabric has that moisture absorption is ventilative, washing shrinkage is low, quick-drying washable, drapability is good, high-color rendering, the plentiful softness of sense of touch, comfortableness are good.
3, through existing FDY production equipment is carried out the flexibility transformation; And the Silk Road adjustment; Select suitable spinning technique technology and online shaping to hand over network complex machining process and technology path; The scrap build less investment, the preparation production cost is low, and product has high-quality, the high added value of similar outward appearance with natural fabric, three-dimensional upright configuration attitude, sandwich construction, the characteristics of applied widely, the differential ultra copyingization of function.
4, the fiber applications that adopts porous superfine denier polyamide 6 POY/FDY to hand over the compound technology of preparing of network to produce is extensive, and with the emulation silk face fabric that its technology becomes to produce, flexibility is superior to terylene, and fabric fall is good; Fine denier filament also is the good raw material of eiderdown shell fabric, after fine denier filament adds bullet, can process the slight knitting product, and is very popular.
Description of drawings
Fig. 1 is preparation technology's flow chart of a kind of porous superfine denier polyamide 6 POY/FDY intermingled composite fibers of providing of the embodiment of the invention.
The practical implementation method
Below in conjunction with accompanying drawing and embodiment, technical scheme of the present invention is done further to set forth.
Embodiment 1
Referring to accompanying drawing 1; It is preparation technology's flow chart that a kind of porous superfine denier polyamide 6 POY/FDY that present embodiment provides hand over the network compound silk, and a kind of novel good porous superfine denier polyamide 6 POY/FDY intermingled composite fiber preparation methods of production performance are provided.Production technology is following:
The polyamide 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 6 is done section and is got into screw rod, and the adding mass fraction is 5.0% 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 80%, and the content of maleic anhydride is 12%, and all the other are benzene alkene; Section is adopted 5 grades of screw rod melt extrusion processes, through heating and melting with after additive fully mixes in screw rod; Mix, measure, filter the back and get into spinning manifold, carry out flow measurement (by the specification setting) by measuring pump and get into filament spinning component, melt sprays from the spinnerets micropore then; Cooling curing is shaped; The cooling curing device is Xu Lenghe ring blowing cooling, and 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; Strand behind cooling curing is divided into two bundles, and is a branch of through oiling, obtaining polyamide 6 fullly drawn yarn (FDY) FDY after network, stretching and the HEAT SETTING in advance; Be drawn to second godet roller again after being drawn to first godet roller after another Shu Jing oils and carrying out preparatory network, obtain polyamide 6 pre-oriented yarn (POY); With their simultaneously input nozzle hand over network compound, and through coiler device with 4000～4500m/min speed coiling and molding, make porous superfine denier polyamide 6 POY/FDY intermingled composite fibers, concrete technological parameter is seen table 1.The relevant performance of the porous superfine denier polyamide 6 POY/FDY intermingled composite fibers that prepare is referring to table 2.
Table 1
Table 2
| Project | Unit | Properties of product |
| Line density | dtex | 66 |
| Line density coefficient of variation cv | % | 2.65 |
| Bar evenness (cv) | % | 1.2 |
| Fracture strength | cN/dex | 2.75 |
| Fracture strength coefficient of variation cv | % | 4.70 |
| Elongation at break | % | 29 |
| Elongation at break coefficient of variation cv | % | 8.00 |
| Oil content | % | 0.65 |
| Boiling water shrinkage | % | 28 |
| The network degree | Individual/rice | 20 |
| Dye uniformity (ash card) | Level | ≥4.5 |
| Outward appearance/excellent rate | % | ≥98% |
Existing FDY production equipment is carried out the flexibility transformation in utilization of the present invention and nozzle arrangements improves and the Silk Road adjustment; Select suitable spinning technique technology and online shaping to hand over network complex technique and processing condition, have that production cost is low, flexible operation big, have that colouring property is good, properties of product stable and the added value advantages of higher.The intermingled composite fiber preparation method who is provided adopts online shaping to hand over the network complex technique, spins speed and improves 35～50%, and energy consumption descends 35～45%.This technology can be produced high perceptual three-dimensional structure composite fibre; Process the composite fibre of the iso-fineness of different size, different cultivars or same breed, same size, different elongation and different contraction; And fiber construct has by the formed suction wet guiding function of capillary core sucting action, premium properties such as make that its fabric has that moisture absorption is ventilative, washing shrinkage is low, quick-drying washable, drapability is good, high-color rendering, the plentiful softness of sense of touch, comfortableness are good.This technological operation is simple, produce and be easy to control, production cost is low, output is high, high-quality, applied widely, added value is high.
Claims (8)
1. porous superfine denier polyamide 6 POY/FDY intermingled composite fibers; Specification is 66dtex/136f～88dtex/136f, it is characterized in that: it comprises that mass fraction is 0.5～5.0% additive, and 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. equipment for preparing porous superfine denier polyamide 6 POY/FDY intermingled composite fibers as claimed in claim 1; 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, oiling device and coiling and forming device is characterized in that:
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;
Described oiling device, its 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;
Described coiling and forming device comprises that POY is shaped, FDY is shaped, hands over network nozzle and up-coiler.
3. a kind of equipment for preparing porous superfine denier polyamide 6 POY/FDY intermingled composite fibers according to claim 2; Described POY is shaped and comprises first, second godet roller and preparatory Network device, and Network device places the centre of first godet roller and second godet roller in advance.
4. a kind of equipment for preparing porous superfine denier polyamide 6 POY/FDY intermingled composite fibers according to claim 2, described FDY winding shaping comprise first, second and the 3rd drawing roller, in advance Network device and Network device.
5. method for preparing porous superfine denier polyamide 6 POY/FDY intermingled composite fibers as claimed in claim 1 comprises that chip drying, melt extruded, melt are extruded, cooling curing, oil nozzle oils and the winding shaping operation, it is characterized in that:
Described melt extruded operation adds mass fraction and is 0.5～5.0% additive in polyamide 6 section, section is with after additive fully mixes; Adopt 5 grades of screw rod melt extrusion processes, the temperature of 5 grades of screw rods is respectively 249 ± 2 ℃, 259 ± 2 ℃; 262 ± 2 ℃, 260 ± 2 ℃ and 259 ± 2 ℃; Described additive is methacrylate, maleic anhydride and the benzene nanometer randomcopolymer of alkene, and 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;
Described cooling curing operation is Xu Lenghe ring blowing cooling; The heating-up temperature of Xu Leng is 230 ± 2 ℃; The process conditions of ring blowing are: pressure 490Pa, 22 ℃ ± 2 ℃ of wind-warm syndrome, humidity 90% ± 5%, wind speed 0.40 m/s～0.50 m/s;
Strand behind the cooling curing is divided into two bundles, a branch of through oiling, obtaining FDY after network, stretching and the HEAT SETTING in advance; Be input to second godet roller again after being input to first godet roller after another Shu Jing oils and carrying out preparatory network, obtain POY, again they are imported simultaneously that to hand over the network nozzle to carry out compound,, make porous superfine denier polyamide 6 POY/FDY intermingled composite fibers through coiling and molding.
6. a kind of method for preparing porous superfine denier polyamide 6 POY/FDY intermingled composite fibers according to claim 5; The preparation technology who it is characterized in that described POY is: the tow input speed after oil nozzle oils is first godet roller of 3895～4400 m/min; Through pressure is after the preparatory Network device of 0.75 ± 0.05 bar carries out preparatory network; Admission velocity is second godet roller of 4000～4500 m/min again, and godet roller is cold roller.
7. a kind of method for preparing porous superfine denier polyamide 6 POY/FDY intermingled composite fibers according to claim 5; The preparation technology who it is characterized in that described FDY is: the tow after nozzle oils boundling is imported preparatory network; Network pressure is 0.75 ± 0.05 bar in advance; Be drawn to the first normal temperature drawing roller again and the second normal temperature drawing roller stretches, their speed is respectively 3495～3980 m/min and 4050～4560 m/min; Carry out HEAT SETTING through the 3rd hot-rolling, its temperature is 135～155 ℃, and speed is 4010～4515 m/mi; Input pressure is the master network of 3 ± 0.05 bar again.
8. a kind of method for preparing porous superfine denier polyamide 6 POY/FDY intermingled composite fibers according to claim 5 is characterized in that described coiling and molding, and its winding speed is 4000～4500 m/mi.
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