CN102493016B - Porous superfine polyamide 6 fully-drawn yarn, preparation method thereof, and equipment thereof - Google Patents
Porous superfine polyamide 6 fully-drawn yarn, preparation method thereof, and equipment thereof Download PDFInfo
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- CN102493016B CN102493016B CN201110432640.6A CN201110432640A CN102493016B CN 102493016 B CN102493016 B CN 102493016B CN 201110432640 A CN201110432640 A CN 201110432640A CN 102493016 B CN102493016 B CN 102493016B
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Abstract
The invention relates to a porous superfine polyamide 6 fully-drawn yarn, a preparation method thereof, and equipment thereof. According to the invention, existing FDY production equipment is adopted. A raw material polyamide 6 is sliced and dried; an additive is added on line; the material is subject to screw extrusion and melt extrusion; the material is then cured with a gradually cooling manner and a circular air blow cooling manner; with a reasonably selected spinning temperature of 259-262 DEG C, an air temperature in the circular air blowing process of 19-23 DEG C, a humidity of 85-95%, an air velocity of 0.35-0.45m/s, an oiling and clustering position of 700-800mm, and a winding speed of 4100-4600m/min, the porous superfine polyamide 6 fully-drawn yarn product with a specification of 55dtex/144f-75dtex/144f is prepared. Flexible operation is adopted in the preparation method. The preparation method is advantaged in simple technology and low production cost. The product is advantaged in stable performance, good yarn evenness, and good coloration property.
Description
Technical field
The present invention relates to a kind of novel Multi-hole superfine denier polyamide 6 fullly drawn yarn (FDY)s, preparation method and equipment thereof, belong to chemical fibre technical field.
Background technology
The potential characteristic of Multi-hole superfine denier polyamide 6 fullly drawn yarn (FDY)s has high-flexibility and good, the high moisture absorption of pleasant softness and oil absorption, specific area is large and the good physics and chemistry performance such as highly dense structure, its fabric manufactured goods have the good super high-emulation natural fabric effects such as moisture absorption is ventilative, washing shrinkage is low, painted by force, folding is good, rotproofness is strong, the plentiful softness of sense of touch, quick-drying washable, non-ironing, drapability is good, comfortableness is good, therefore, be widely used in the consumption markets, middle and high end such as garment material, bedding, adornment, leather and fur products.
At present, mainly by following three kinds of technological approaches, prepare conventional polyamide 6 fullly drawn yarn (FDY) both at home and abroad: melt-spun is produced the method for conventional polyamide 6 fullly drawn yarn (FDY) fiber, conventionally by the conventional two-step method of undrawn yarn-drawn yarn (UDY-DT), develop into the process route of the one-step method of pre-oriented yarn-drawn yarn (POY-DT) high speed two-step method and fullly drawn yarn (FDY) (FDY), spinning speed is brought up to 4500 ms/min by 1000 ms/min, and fiber number is down to 0.35～0.55dpf by 2～3dpf.But with existing conventional melt-spinning technology technical method and equipment, owing to can not effectively adjusting and control the unfavorable factor of the winding tensile of strand and the uniform and stable property existence of Multi-hole superfine denier polyamide 6 as-spun fibre spinning cooling formings, melt spinning is shaped unstable, lousiness broken end is many, the dry lack of homogeneity of ribbon, dyeing uniformity is poor, unstable product quality, cannot realize the production of 55dtex/144f～75dtex/144f Multi-hole superfine denier polyamide 6 fullly drawn yarn (FDY)s.Therefore,, on production technology and equipment, need badly and improve.
Summary of the invention
The object of the invention is to overcome the deficiency that prior art exists, utilize existing FDY device resource, provide a kind of melt spinning to be shaped stable, lousiness little breakage, the dry uniformity of ribbon and dyeing uniformity are good, constant product quality, added value is high, production Technology is easy to regulation and control production 55dtex/144f～75dtex/144f Multi-hole superfine denier polyamide 6 fullly drawn yarn (FDY) products, preparation method and equipment thereof.
In order to achieve the above object, the technical solution used in the present invention is to provide a kind of Multi-hole superfine denier polyamide 6 fullly drawn yarn (FDY)s, specification is 55dtex/144f～75dtex/144f, it comprises that mass fraction is 0.5～5.0% additive, described additive is methacrylate, maleic anhydride and cinnamic nanometer randomcopolymer, and by weight percentage, the content of methacrylate is 75～85%, the content of maleic anhydride is 10～12%, and all the other are styrene.
An equipment of preparing Multi-hole superfine denier polyamide 6 fullly drawn yarn (FDY)s of the present invention, the FDY equipment based on producing conventional variety, comprises pre-crystallized, dry, screw rod melt extruded device, spinning manifold, measuring pump, filament spinning component, spinnerets device for spinning; Additive injector is installed on the charging aperture of screw rod melt extruded device; Xu Leng heater is installed below spinnerets, and heating region height is 100～120mm; The below installing ring cold wind blower of Xu Leng heater; The boundling oil frame that oils is arranged on the below of ring cold wind blower, and the distance of leaving spinnerets is 750 ± 50 mm places; Coiling and forming device comprises first, second, and third drawing roller, pre-Network device, Network device and up-coiler.
A kind of method of preparing Multi-hole superfine denier polyamide 6 fullly drawn yarn (FDY)s of the present invention, comprise that chip drying, screw extruding, melt extrusion, cooling curing, the oil nozzle boundling that oils becomes tow, tow through pre-network, stretching and HEAT SETTING, again input interlacing jet nozzle to carry out network after winding shaping, its process conditions are as follows:
1, in polyamide 6 section, adding mass fraction is 0.5～5.0% additive, described additive is methacrylate, maleic anhydride and cinnamic nanometer randomcopolymer, by weight percentage, the content of methacrylate is 75～85%, the content of maleic anhydride is 10～12%, and all the other are styrene;
2, after section fully mixes in screw rod with additive, adopt 5 grades of screw rod melt extrusion processes, the temperature of 5 grades of screw rods is respectively 251 ± 2 ℃, and 259 ± 2 ℃, 262 ± 2 ℃, 261 ± 2 ℃ and 260 ± 2 ℃;
3, melt, after spinnerets is extruded as melt thread, adopts Xu Lenghe ring quenching technique to solidify out into strand; The heating-up temperature of Xu Lengqu is 230 ± 2 ℃; The process conditions of ring blowing are: pressure 520Pa, 21 ± 2 ℃ of wind-warm syndrome, humidity 90 ± 5%, wind speed 0.35～0.45 m/s;
4, the tow oiling after boundling through nozzle is inputted pre-network, pre-network pressure is 0.8 ± 0.05 bar, be drawn to the first normal temperature drawing roller and the second normal temperature drawing roller stretches, their speed is respectively 3595～4080 m/min and 4150～4660 m/min again; Through the 3rd hot-rolling, carry out HEAT SETTING, its temperature is 135～155 ℃, and speed is 4110～4615 m/mi; Input interlacing jet nozzle again and carry out network, network pressure is 3 ± 0.05 bar, then carries out coiling and molding with the winding speed of 4100～4600 m/mi, and making specification is the Multi-hole superfine denier polyamide 6 fullly drawn yarn (FDY) spinning cakes of 55dtex/144f～75dtex/144f.
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, device and relevant production drawing process condition have been improved, effectively controlled aggregated structure adjustment and fibre morphology in shaping, and the supramolecular structure of the orientation of the high order in process and crystallization; Meanwhile, by transformation FDY device fabrication, further improve melt mixed uniformity and pressure stability, effectively adjust and control winding tensile and the dry inhomogeneous rate of bar of strand.
2, the present invention utilizes existing production FDY equipment, to produce in the FDY equipment of conventional variety the constant temperature of shock chamber, the lateral blowing cooling air system plant modification of constant humidity becomes Xu's device for cooling and ring blowing device cooling curing system and device, by choose reasonable spinning temperature, cooling quench condition of cure, gather position and winding speed oil, the method of preparing 55dtex/144f～75dtex/144f Multi-hole superfine denier polyamide 6 fullly drawn yarn (FDY) products, makes the value-added content of product height that is improved.
3, the groups of fibers structure obtaining by technical solution of the present invention, there is capillary core sucting action and form water suction wet guiding function, there is good super high-emulation silk effect, make its fabric there is the premium properties such as moisture absorption is ventilative, washing shrinkage is low, painted by force, folding is good, rotproofness is strong, the plentiful softness of sense of touch, quick-drying washable, non-ironing, drapability is good, comfortableness is good.
4, technical solution of the present invention have technique simple, produce be easy to control and can utilize existing equipments resources, cost is low, output is high, quality is good, added value high, is a kind of novel 55dtex/144f～75dtex/144f Multi-hole superfine denier polyamide 6 fullly drawn yarn (FDY) preparation technologies.
The specific embodiment
Below in conjunction with embodiment, technical solution of the present invention will be further described.
Embodiment 1
The present embodiment provides 55dtex/144f Multi-hole superfine denier polyamide 6 fullly drawn yarn (FDY)s that a kind of novel production performance is good.Its FDY equipment based on producing conventional variety, comprise pre-crystallized, dry, screw rod melt extruded device, 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, Xu Leng heater is installed below spinnerets, and heating region height is 100～120mm; The below installing ring cold wind blower of Xu Leng heater; The boundling oil frame that oils is arranged on the below of ring cold wind blower, and the distance of leaving spinnerets is 750 ± 50 mm places; Coiling and forming device comprises first, second, and third drawing roller, pre-Network device, Network device and up-coiler.
Production technology is as follows:
Polyamide 6 section relative viscosity is 2.70～3.10, relative molecular weight is 16000～18000, section at 145 ℃ pre-crystallized about 30 minutes, deliver to drying tower inner drying 6～8 hours, baking temperature is 155 ℃, guarantee that section moisture content is less than 30ppm, the dry section of dried polyamide 6 enters screw rod, in chinlon 6 section, adding mass fraction is 3.0% additive, described additive is methacrylate, maleic anhydride and cinnamic nanometer randomcopolymer, by weight percentage, the content of methacrylate is 85%, the content of maleic anhydride is 10%, all the other are styrene, after section fully mixes in screw rod with additive, adopt 5 grades of screw rod melt extrusion processes, through heating and melting, after mixing, measure, filtering, enter spinning manifold, through measuring pump, filament spinning component, spinnerets, be extruded as melt thread, through Xu's device for cooling and ring blowing device cooling curing, be shaped, and the boundling that oils become tow, tow through pre-network, stretching and HEAT SETTING, again input interlacing jet nozzle to carry out network after coiling and molding, make 55dtex/144f Multi-hole superfine denier polyamide 6 fullly drawn yarn (FDY) spinning cakes.Relevant technological parameters is in Table 1.
Table 1
The relevant performance of 55dtex/144f Multi-hole superfine denier polyamide 6 fullly drawn yarn (FDY) is referring to table 2.
Table 2
| Performance | Product index |
| Outward appearance/excellent rate | ≥98% |
| Line density | 55 |
| The line density coefficient of variation (%) | ≤1.50 |
| Fracture strength (cN/dex) | ≥3.65 |
| The fracture strength coefficient of variation (%) | ≤8.0 |
| Elongation at break (%) | 45±5% |
| The elongation at break coefficient of variation (%) | ≤12.0 |
| Oil content (%) | 1.0±0.20 |
| Boiling water shrinkage | 9.5 |
| Network degree (individual/rice) | 12±3 |
| Bar evenness | ≤2.0 |
| Dye uniformity (ash card) | ≥4.0 |
Polyamide 6 provided by the invention (polyamide fibre 6) fullly drawn yarn (FDY), has fine structure, interfibrous fine space, space three-dimensional vertical configuration state, sandwich construction and the outward appearance similar to natural fabric that specialty fibers group forms.To compare its sense of touch more soft with general fiber, resilience is better, and can overcome that natural fabric easily wrinkles, the air-locked shortcoming of artificial fibre, and compared with natural fabric, be significantly improved aspect spreadability, bulkiness and warmth retention property, aspect style, can give the super well-pressed soft feeling of fabric, natural sense, glutinous and dry feeling, added value is higher, its fabrics feel soft is also fluffy, there is the specific functions such as waterproof, moisture transported permeable, reach the object of snugness of fit, be widely used in the fields such as chemical fibre market, middle and high end.
Water imbibition, oil absorption and the cleaning function of the polyamide 6 of preparing by technical solution of the present invention (polyamide fibre 6) fullly drawn yarn (FDY) (FDY) are higher, have the characteristics such as anti-marine alga, the corrosion of anti-shellfish, apply comparatively extensive.Be suitable for makeing the high-grade fabrics such as Silk-Like, linnet, peach-skin fabrics, can be used for making mountain-climbing skiing clothes, jacket, parka etc. and other functional materials.In addition, can also reach high simulated effect with mixed yarn or different fibril, by increasing, heavy twist and high fiber number long filament change fabric feeling and solid sense reaches imitative numb effect; Mixed fine and add weak twist napping and make peach-skin fabrics with high-shrinkage filament or spandex and its; By high density designs, in rear arrangement, make fabric thermal contraction reach high densification, also can mix fine processing, make its fabrics feel soft fluffy, there is the specific functions such as waterproof, moisture transported permeable, reach the object of snugness of fit.
Claims (1)
1. a method of preparing Multi-hole superfine denier polyamide 6 fullly drawn yarn (FDY)s, comprise that chip drying, screw extruding, melt extrusion, cooling curing, the oil nozzle boundling that oils becomes tow, tow through pre-network, stretching and HEAT SETTING, again input interlacing jet nozzle to carry out network after winding shaping, it is characterized in that process conditions are as follows:
(1) in polyamide 6 section, adding mass fraction is 0.5～5.0% additive, described additive is methacrylate, maleic anhydride and cinnamic nanometer randomcopolymer, by weight percentage, the content of methacrylate is 75～85%, the content of maleic anhydride is 10～12%, and all the other are styrene;
(2) after section fully mixes in screw rod with additive, adopt 5 grades of screw rod melt extrusion processes, the temperature of 5 grades of screw rods is respectively 251 ± 2 ℃, and 259 ± 2 ℃, 262 ± 2 ℃, 261 ± 2 ℃ and 260 ± 2 ℃;
(3) melt, after spinnerets is extruded as melt thread, adopts Xu Lenghe ring quenching technique to solidify out into strand; The heating-up temperature of Xu Lengqu is 230 ± 2 ℃; The process conditions of ring blowing are: pressure 520Pa, 21 ± 2 ℃ of wind-warm syndrome, humidity 90 ± 5%, wind speed 0.35～0.45 m/s;
(4) tow oiling after boundling through nozzle is inputted pre-network, pre-network pressure is 0.8 ± 0.05 bar, be drawn to the first normal temperature drawing roller and the second normal temperature drawing roller stretches, their speed is respectively 3595～4080 m/min and 4150～4660 m/min again; Through the 3rd hot-rolling, carry out HEAT SETTING, its temperature is 135～155 ℃, and speed is 4110～4615 m/min; Input interlacing jet nozzle again and carry out network, network pressure is 3 ± 0.05 bar, then carries out coiling and molding with the winding speed of 4100～4600 m/min, and making specification is the Multi-hole superfine denier polyamide 6 fullly drawn yarn (FDY) spinning cakes of 55dtex/144f～75dtex/144f.
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| CN201110432640.6A CN102493016B (en) | 2011-12-21 | 2011-12-21 | Porous superfine polyamide 6 fully-drawn yarn, preparation method thereof, and equipment thereof |
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| CN104130404B (en) * | 2014-07-23 | 2016-11-02 | 苏州大学 | The terminal modified polyamide 6 of a kind of chain, preparation method and application |
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