CN105350097A - Method for producing ultra-coarse denier flat recycled polyester filaments by the use of recycled polyester bottle flakes - Google Patents
Method for producing ultra-coarse denier flat recycled polyester filaments by the use of recycled polyester bottle flakes Download PDFInfo
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- CN105350097A CN105350097A CN201510636590.1A CN201510636590A CN105350097A CN 105350097 A CN105350097 A CN 105350097A CN 201510636590 A CN201510636590 A CN 201510636590A CN 105350097 A CN105350097 A CN 105350097A
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D13/00—Complete machines for producing artificial threads
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D1/00—Treatment of filament-forming or like material
- D01D1/06—Feeding liquid to the spinning head
- D01D1/09—Control of pressure, temperature or feeding rate
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
- D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
- D01D5/092—Cooling filaments, threads or the like, leaving the spinnerettes in shafts or chimneys
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/253—Formation of filaments, threads, or the like with a non-circular cross section; Spinnerette packs therefor
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
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- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Artificial Filaments (AREA)
Abstract
The invention relates to a method for producing ultra-coarse denier flat recycled polyester filaments by the use of recycled polyester bottle flakes. In the prior art, a method for producing ultra-coarse denier recycled polyester FDY flat filaments by the use of recycled polyester bottle flakes is not provided. The method is characterized by comprising following steps: 1) recycled waste polyester bottles are preprocessed so as to obtain polyester bottle flakes; 2) the preprocessed polyester bottle flakes are subjected to low-temperature vacuum drying treatment; and 3) melted extrusion treatment through screw rods, primary filtering treatment, secondary filtering treatment, conveying treatment through a metering pump, spinning treatment through a spinning box provided with spinning components, cooling treatment through circular blowing air, bundling and oiling treatment, drafting and sizing treatment, and winding and spooling treatment are sequentially performed on the dried performing polyester bottle flakes so as to obtain finished products. According to the invention, technological difficulties in producing the ultra-coarse denier recycled polyester FDY flat filaments by the use of the recycled polyester bottle flakes are overcome, and the ultra-coarse denier flat recycled polyester filaments produced by the use of the recycled polyester bottle flakes are high in fluffiness, are anti-pilling, and are easy to dye.
Description
Technical field
The present invention relates to a kind of method utilizing regenerative piece of polyester bottle to produce flat recycled polyester long filament of super thick dawn, belong to textile chemical fiber field.
Background technology
Polyethylene terephthalate (is called for short polyester, PET) be a kind of hemicrystalline macromolecular material, can be used for the fields such as weaving and plastics, because of its good physical and mechanical properties and ripe processing technology, therefore PET has become the macromolecular material that most widely used, output is maximum in the world.With bottle-grade polyester chip be that the obtained product such as serial bottle, film, implements of raw material has that intensity is high, good brightness, lightweight, transparency good, be convenient to processing, dimensionally stable etc. plurality of advantages, therefore global demand amount increases year by year.Along with a large amount of uses of the products such as polyester bottles class, waste polyester bottle also becomes a serious global problem of environmental pollution because it is not biodegradable.Namely the developed countries and regions such as Europe, the U.S., Japan begin one's study from the sixties in 20th century recycling problem of waste polyester, still remain technological precedence and even monopoly position so far.China's Eleventh Five-Year Plan has also clearly proposed the objectives and tasks of Devoting Major Efforts To Developing PET bottle recovery and reutilization technology since formulating.
How better process and the discarded regenerative polyester bottle of reasonable recycling have become the key issue of polyester industrial sustainable development.At present, the main application that polyester reclaims has regenerated fiber, regeneration bottle, chemical recovering method raw material, engineering plastics, plastic-steel belt, film, sheet material etc.Only for polyester regeneration spinning, compared with primary polyester fiber, often produce 1 ton of Regenerated Polyester Fibres, can save 3 tons of oil, reduce by 21 tons of CO2 emissions, visible Waste Polyester reclaims and reprocessing is very considerable to the effect of energy-saving and emission-reduction.Although the exploitation that people utilize waste and old polyester bottle to carry out spinning through regeneration process is in recent years carried out also more successful, but be also only confined to the product of some low side types, such as utilize traditional technique to change into the not harsh short fiber of service condition, conventional fibre and spunbond product etc. the polyester bottle sheet material reclaimed, and for example publication date is on 09 15th, 2010, publication number is in the Chinese patent of CN101831149A, disclose a kind of preparation method of the regenerative piece of polyester bottle for the production of textile filament raw material, the step of this preparation method comprises raw material and prepares, sorting, label removing, shear, once pulverize, steaming is washed, cleaning, dehydrate, separating twice and sieving, this preparation method can make the content of the impurity of the regenerative piece of polyester bottle in prior art drop to by 2% to be less than 0.02%, and not containing polyester powder, thus broken end can be avoided and avoid fabric to occur stiff silk and cross road in spinning process, the product that this preparation method obtains also can only be used in the product of some low side types.
But, in fibre in differentiation field, utilize reclaiming bottle piece to produce the especially super thick dawn flat fiber of Speciality Pet Fiber and also there is technical bottleneck.Flat filament is the one in fibre in differentiation, has resistant and ANTIPILLING, is easier to dyeing, can give the style of fabric uniqueness and excellent performance, the extremely welcome of consumer.Flatness is the important indicator weighing 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 make 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.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 also there is technical bottleneck in the production aspect utilizing regenerative piece of polyester bottle to produce super thick dawn recycled polyester FDY flat filaments, does not also have corresponding preparation method to be seen in report.
Summary of the invention
The object of the invention is to solve the technical bottleneck utilizing regenerative piece of polyester bottle to produce super thick dawn recycled polyester FDY flat filaments, and provide a kind of regenerative piece of polyester bottle that utilizes with performances such as superior bulkiness, ANTIPILLING, easy dyeings to produce the method for flat recycled polyester long filament of super thick dawn.The present invention is optimized improvement to current ultra-coarse denier polyester filament yarn (circular cross-section) process conditions, and utilize regenerative piece of polyester bottle through special process develop meet after road user require, the super thick dawn recycled polyester FDY flat filaments product of function admirable.
The present invention's adopted technical scheme that solves the problem is: this feature utilizing regenerative piece of polyester bottle to produce the method for flat recycled polyester long filament of super thick dawn is: the step of described method is as follows:
1) preliminary treatment is carried out to the discarded regenerative polyester bottle reclaimed and obtain polyester bottle slice;
2) will through pretreated polyester bottle slice through low-temperature vacuum drying process;
3) dried polyester bottle slice is oiled through screw rod melt extruded, primary filter, cascade filtration, measuring pump, spinning manifold, filament spinning component, ring quenching, boundling successively, drafting forming and winding doff, step 3) is specific as follows:
The polyester bottle slice of drying process is obtained polyester bottle slice melt through screw rod melt extruded, and during screw rod melt extruded, the temperature in each district of screw rod controls between 260 DEG C ~ 320 DEG C; Improve screw rod to overcome the problem that the not of uniform size and plot ratio of polyester bottle slice is obviously different from normal polyester section raw material, the draw ratio of screw rod is 25 ~ 35, screw head is provided with torpedo head or pin for increasing mixing usefulness, and screw rod head Stress control is at 12 ~ 20Mpa; Polyester bottle slice melt enters primary filter and filters, and the screen pack precision of primary filter is 60 ~ 150 orders, and filtration temperature is 255 DEG C ~ 310 DEG C; Polyester bottle slice melt after primary filter enters secondary filter and filters, and the screen pack precision of secondary filter is 100 ~ 250 orders, and filtration temperature is 260 DEG C ~ 300 DEG C, and the filtration gross area of secondary filter is 4.0 ~ 8.0m
2;
Polyester bottle slice melt after filtration enters the spinning manifold with filament spinning component through the measuring pump of supercharging, and before spinning manifold, pressure remains on 4Mpa ~ 6Mpa, the temperature of spinning manifold is remained on 255 DEG C ~ 300 DEG C; Filament spinning component comprises screen pack, the extra large sand of different thicknesses, distribution plate, deflector, packing ring and spinnerets, spinneret orifice on spinnerets is " one " character form structure, the hole sectional dimension of spinneret orifice is 1.5mm × 0.15mm ~ 5.0mm × 0.40mm, the hole depth of spinneret orifice is 0.5mm ~ 1.5mm, and the number of spinneret orifice is 8 ~ 24; Polyester bottle slice melt through spinnerets ejection after through ring quenching, the wind speed of ring blowing is 0.5 ~ 1.5m/s, the temperature of ring blowing is 15 ~ 35 DEG C, ring blowing adopts the mode of outer-ring ventilation, use outer-ring ventilation dry with the bar controlling fiber, make that tow cooling is even, bar does homogeneous and dyeability good; The boundling point distance that oils spinnerets 120cm ~ 200cm, obtains tow after boundling oils;
The tow after boundling that oils carries out hot gas spring sizing, tow is after the first hot-rolling and the second hot-rolling drawing-off, shaping, enter the nozzle of interlace through the 3rd deflector roll again, the temperature of the first hot-rolling and the second hot-rolling is respectively 90 ~ 120 DEG C and 170 ~ 190 DEG C, and draw ratio is 1.6 ~ 2.2; Tow after drafting forming carries out coiling and molding, and the winding speed of coiling and molding is 3000 ~ 4500m/min, obtains flat recycled polyester long filament of super thick dawn.
Above-mentioned technical characteristic of the present invention forms an impartible entirety, above-mentioned technical characteristic of the present invention can not be isolated into a few part to treat completely, the present invention uses the entire combination of these technical characteristics to achieve to utilize regenerative piece of polyester bottle to produce the object of obtained flat recycled polyester long filament of super thick dawn simultaneously, and this obtained flat recycled polyester long filament of super thick dawn has excellent bulkiness, the performance of anti-pilling and easy dyeing etc., the filament number of super thick dawn recycled polyester flat silk fiber is 8dtex ~ 20dtex, 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%.
As preferably, in step 1) of the present invention, carry out preliminary treatment to the regenerative polyester bottle reclaimed to comprise and sort regenerative polyester bottle, pulverize, clean and rinsing process, wherein sorting operation is that bottle is transported to sorting arrangement place, this sorting arrangement is different according to the spectral signal of unlike material bottle, adopts infrared spectrum light beam irradiation and carries out sorting process; Polyester bottles after sorting enters disintegrating apparatus and pulverizes, and obtains polyester bottle slice; Matting selects different cleaning ways according to the source of polyester bottles: for oil bottle, repeatedly need clean with stronger alkaline warm water; For beverage bottle, weak alkaline aqueous solution is utilized repeatedly to clean; Cleaned polyester bottle slice carries out predrying again after rinsing.
As preferably, step 2 of the present invention) in, dropped in vacuumize rotary drum by predrying good polyester bottle slice and carry out dynamic low temperature drying, wherein the capacity of rotary drum is 2 ~ 6 tons; Logical steam or admittance deep fat in rotary drum chuck, temperature keeps 100 DEG C ~ 180 DEG C; Rotary drum slowly runs and vacuumizes simultaneously, and 6 ~ 12 hours drying times, the moisture of dried polyester bottle slice controls at below 80ppm.
As preferably, in step 3) of the present invention, screw rod during screw rod melt extruded each district temperature controls at 270 DEG C ~ 300 DEG C, the filtration temperature of primary filter is 260 DEG C ~ 300 DEG C, the filtration temperature of secondary filter is 265 DEG C ~ 290 DEG C, and the temperature of spinning manifold remains on 265 DEG C ~ 290 DEG C.
As preferably, in step 3) of the present invention, the plate face internal diameter of spinnerets is 70mm.
As preferably, in step 3) of the present invention, because fiber is flat and comparatively thick, need strengthen the oil concentration that boundling oils, cause fiber surface to damage to reduce friction, oil concentration is 8-20%, and this percentage is weight percentage.Oil concentration refers to that in the finish emulsion that finish and distilled water are configured to, finish accounts for the percentage of emulsion gross weight.Finish can be terylene FDY oil.
As preferably, the filament number of super thick dawn recycled polyester flat silk fiber of the present invention is 8dtex ~ 20dtex, and the flatness of fiber is 4.0 ~ 9.0, and the bar evenness of fiber is 1.0 ~ 2.0%, fibrous fracture intensity is 3.8 ~ 5.0cN/dtex, and elongation at break is 25% ~ 40%.
As preferably, logical steam or admittance deep fat in rotary drum chuck of the present invention, temperature keeps 120 DEG C ~ 170 DEG C.
As preferably, screw rod during screw rod melt extruded of the present invention each district temperature controls at 270 DEG C ~ 285 DEG C, the filtration temperature of primary filter is 270 DEG C ~ 280 DEG C, and the filtration temperature of secondary filter is 275 DEG C ~ 285 DEG C, and the temperature of spinning manifold remains on 270 DEG C ~ 285 DEG C.
A kind of flat recycled polyester long filament of super thick dawn, its feature is: adopt method of the present invention to obtain.
The present invention compared with prior art, have the following advantages and effect: 1, equipment improvement: be different from normal polyester section, the sheet stock of the polyester bottle slice of regeneration is not of uniform size and bulk density is little, adopt usual manner charging can there is charging instability, screw rod loops, the problems such as efficiency is low, the present invention improves screw rod, comprise screw feed section (spiral groove depth, pitch increase etc.), melt zone, the improvement of the parts such as back-mixing section and draw ratio, wherein the draw ratio of screw rod is for being increased to 25 ~ 35, and screw head increases torpedo head or pin, increase mixing usefulness, spinnability is improved and improves.2, the present invention adopts ring blowing technique, and solves by process modification the problem that super coarse denier fiber easily produces " skin-core " structure in spinning process.Because filament number is up to more than 8dtex, melt is difficult to quick cooling, conventional air regulator cooling length can not meet the spinning demand of super-thick denier polyester long filament: strengthen cooling wind speed if one-sided, reduce wind-warm syndrome, super-thick denier polyester filament fiber can be fast because of surface cool, internal cooling is slow and produce " skin-core " structure, ribbon is caused to do, dyeing, stretch by force variation and wait series of problems greatly, and due to inside and outside cooling irregular, super thick dawn flat fiber length and width are caused to shrink irregular, have a strong impact on flatness and the uniformity thereof of fiber, cause the problems such as product quality declines and following process difficulty is large.Therefore, on chilling temperature, cooling wind speed and boundling oil drop choose particularly crucial.3, stable production process of the present invention, good product quality, compensate for the deficiency of domestic super thick dawn recycled polyester FDY flat filaments production technology, improves scientific and technological content and the added value of China's recycled polyester raw material spinning.
Accompanying drawing explanation
Fig. 1 is the process flow diagram utilizing regenerative piece of polyester bottle to produce the method for flat recycled polyester long filament of super thick dawn in the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing also by 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.
Embodiment 1.
As shown in Figure 1, regenerative piece of polyester bottle is utilized to produce the step of method of flat recycled polyester long filament of super thick dawn in the present embodiment as follows: by regenerative polyester bottle after sorting, broken, cleaning, rinsing and the process such as predrying, drop in vacuum drum, rotary drum temperature 130 DEG C, dry 12h.Afterwards dried regenerative piece of polyester bottle is put into screw rod, screw slenderness ratio is 25, and the temperature of screw rod the first to SECTOR-SEVEN is respectively 260 DEG C, 270 DEG C, 280 DEG C, 280 DEG C, 280 DEG C, 280 DEG C, 278 DEG C and 275 DEG C, and screw rod head pressure is 18Mpa.Polyester bottle slice melt is entered secondary filter after primary filter (filtration temperature is 270 DEG C, and screen pack precision is 80 orders), and wherein the screen pack precision of secondary filter is 120 orders, and filtration temperature is 280 DEG C, and the filtration gross area of filter is 4.0m
2.Polyester bottle slice melt after filtration enters spinning manifold through positive battery metering pump, and spinning body temperature is 283 DEG C; The spinneret orifice of polyester bottle slice melt on spinnerets (plate face internal diameter 70mm) is extruded, wherein the shape of spinneret orifice is " one " font, its mesopore cross section 1.5mm × 0.25mm, hole depth 0.5mm, namely spinneret orifice is flat rectangular-shaped structure, and the number of spinneret orifice is 24.The tow that spinneret orifice is extruded is cooled by outer-ring ventilation, and the wind speed of ring blowing is 0.8m/s, and the temperature of ring blowing is 29 DEG C.Tow carries out drawing-off winding after boundling oils, and the boundling point distance that oils spinnerets 130cm, oil concentration 9%, this percentage is weight percentage.Tow enters the nozzle of interlace through the 3rd deflector roll again through the first hot-rolling and the second hot-rolling drawing-off, sizing, and the temperature of the first hot-rolling and the second hot-rolling is respectively 90 DEG C and 170 DEG C.Draw ratio is 2.2; Winding speed is 3700m/min, obtains flat recycled polyester long filament of super thick dawn after coiling and molding.After tested, the filament number of super thick dawn recycled polyester FDY flat filaments is 9dtex, and the flatness of fiber is 5.0, and the bar evenness of fiber is 1.5%, and fibrous fracture intensity is 3.6cN/dtex, and elongation at break is 22%.
Embodiment 2.
As shown in Figure 1, utilize regenerative piece of polyester bottle to produce the step of method of flat recycled polyester long filament of super thick dawn in the present embodiment as follows: by regenerative polyester bottle through sorting, fragmentation, cleaning, rinsing, predrying etc. process after, drop in vacuum drum, rotary drum temperature 145 DEG C, dry 10h.Afterwards dried regenerative piece of polyester bottle is put into screw rod, screw slenderness ratio is 30, and the temperature of screw rod the first to SECTOR-SEVEN is respectively 263 DEG C, 273 DEG C, 282 DEG C, 282 DEG C, 282 DEG C, 282 DEG C, 280 DEG C and 277 DEG C, and screw rod head pressure is 17Mpa.Polyester bottle slice melt is entered secondary filter after primary filter (filtration temperature is 272 DEG C, and screen pack precision is 100 orders), and wherein the screen pack precision of secondary filter is 170 orders, and filtration temperature is 278 DEG C, and the filtration gross area of filter is 5.0m
2.Polyester bottle slice melt after filtration enters spinning manifold through positive battery metering pump, and spinning body temperature is 280 DEG C; The spinneret orifice of polyester bottle slice melt on spinnerets (plate face internal diameter 70mm) is extruded, and wherein spinneret orifice is " one " font, its mesopore cross section 2.0mm × 0.25mm, hole depth 0.7mm, and namely spinneret orifice is flat rectangular-shaped structure, and the number of spinneret orifice is 16.The tow that spinneret orifice is extruded is cooled by outer-ring ventilation, and the wind speed of ring blowing is 1.0m/s, and the temperature of ring blowing is 25 DEG C.Tow carries out drawing-off winding after boundling oils, and the boundling point distance that oils spinnerets 150cm, oil concentration 11%, this percentage is weight percentage.Tow enters the nozzle of interlace through the 3rd deflector roll again through first, second hot-rolling drawing-off, sizing, and first, second heat roller temperature is respectively 100 DEG C, 175 DEG C.Draw ratio is 1.8; Winding speed is 4000m/min, obtains flat recycled polyester long filament of super thick dawn after coiling and molding.After tested, the filament number of super thick dawn recycled polyester FDY flat filaments is 12dtex; The flatness of fiber is 6.8; The bar evenness of fiber is 1.4%; Fibrous fracture intensity is 3.6cN/dtex; Elongation at break is 25%.
Embodiment 3.
As shown in Figure 1, utilize regenerative piece of polyester bottle to produce the step of method of flat recycled polyester long filament of super thick dawn in the present embodiment as follows: by regenerative polyester bottle through sorting, fragmentation, cleaning, rinsing, predrying etc. process after, drop in vacuum drum, rotary drum temperature 160 DEG C, dry 10h.Afterwards dried regenerative piece of polyester bottle is put into screw rod, screw slenderness ratio is 30, the temperature of screw rod the first to SECTOR-SEVEN is respectively 265 DEG C, 275 DEG C, 284 DEG C, 284 DEG C, 284 DEG C, 284 DEG C, 282 DEG C and 280 DEG C, and screw rod head pressure is 15Mpa, obtains polyester bottle slice melt.Polyester bottle slice melt is entered secondary filter after primary filter (filtration temperature is 275 DEG C, and screen pack precision is 120 orders), and wherein the screen pack precision of secondary filter is 200 orders, and filtration temperature is 277 DEG C, and the filtration gross area of filter is 7.0m
2.Polyester bottle slice melt after filtration enters spinning manifold through positive battery metering pump, and spinning body temperature is 276 DEG C; The spinneret orifice of polyester bottle slice melt on spinnerets (plate face internal diameter 70mm) is extruded, and wherein spinneret orifice is " one " font, its mesopore cross section 3.0mm × 0.30mm, hole depth 0.9mm, and namely spinneret orifice is flat rectangular-shaped structure, and the number of spinneret orifice is 12.The tow that spinneret orifice is extruded is cooled by outer-ring ventilation, and the wind speed of ring blowing is 1.2m/s, and the temperature of ring blowing is 22 DEG C.Tow carries out drawing-off winding after boundling oils, and the boundling point distance that oils spinnerets 175cm, be displaced downwardly between winding by oil drop on boundling, oil concentration 12%, this percentage is weight percentage.Tow enters the nozzle of interlace through the 3rd deflector roll again through first, second hot-rolling drawing-off, sizing, and first, second heat roller temperature is respectively 110 DEG C, 180 DEG C.Draw ratio is 1.6; Winding speed is 4300m/min, obtains flat recycled polyester long filament of super thick dawn after coiling and molding.After tested, the filament number of super thick dawn recycled polyester FDY flat filaments is 16dtex; The flatness of fiber is 8.7; The bar evenness of fiber is 1.5%; Fibrous fracture intensity is 3.4cN/dtex; Elongation at break is 26%.
Embodiment 4.
As shown in Figure 1, utilize regenerative piece of polyester bottle to produce the step of method of flat recycled polyester long filament of super thick dawn in the present embodiment as follows: by regenerative polyester bottle through sorting, fragmentation, cleaning, rinsing, predrying etc. process after, drop in vacuum drum, rotary drum temperature 170 DEG C, dry 8h.Afterwards dried regenerative piece of polyester bottle is put into screw rod, screw slenderness ratio is 35, and the temperature of screw rod the first to SECTOR-SEVEN is respectively 265 DEG C, 275 DEG C, 285 DEG C, 285 DEG C, 285 DEG C, 285 DEG C, 282 DEG C and 280 DEG C, and screw rod head pressure is 13Mpa.Polyester bottle slice melt is entered secondary filter after primary filter (filtration temperature is 277 DEG C, and screen pack precision is 120 orders), and wherein the screen pack precision of secondary filter is 250 orders, and filtration temperature is 276 DEG C, and the filtration gross area of filter is 8.0m
2.Polyester bottle slice melt after filtration enters spinning manifold through positive battery metering pump, and spinning body temperature is 274 DEG C; The spinneret orifice of polyester bottle slice melt on spinnerets (plate face internal diameter 70mm) is extruded, and wherein spinneret orifice is " one " font, its mesopore cross section 4.0mm × 0.4mm, hole depth 1.2mm, and namely spinneret orifice is flat rectangular-shaped structure, and the number of spinneret orifice is 8.The tow that spinneret orifice is extruded is cooled by outer-ring ventilation, and the wind speed of ring blowing is 1.5m/s, and the temperature of ring blowing is 18 DEG C.Tow carries out drawing-off winding after boundling oils, and the boundling point distance that oils spinnerets 200cm, oil concentration 13%, this percentage is weight percentage.Tow enters the nozzle of interlace through the 3rd deflector roll again through first, second hot-rolling drawing-off, sizing, and first, second heat roller temperature is respectively 120 DEG C, 190 DEG C.Draw ratio is 1.2; Winding speed is 4400m/min, obtains flat recycled polyester long filament of super thick dawn after coiling and molding.After tested, the filament number of super thick dawn recycled polyester FDY flat filaments is 20dtex; The flatness of fiber is 8.1; The bar evenness of fiber is 1.9%; Fibrous fracture intensity is 3.3cN/dtex; Elongation at break is 27%.
Embodiment 5.
As shown in Figure 1, utilize the step of the method for regenerative piece of polyester bottle production flat recycled polyester long filament of super thick dawn as follows in the present embodiment.
1) raw materials for production used are discarded polyester bottles and/or bottle chips resin, carry out preliminary treatment to the discarded regenerative polyester bottle reclaimed and/or bottle chips resin.
2) will through pretreated polyester bottle slice through low-temperature vacuum drying process.
3) dried polyester bottle slice is oiled through screw rod melt extruded, primary filter, cascade filtration, measuring pump, spinning manifold, filament spinning component, ring quenching, boundling, drafting forming, winding doff, obtain finished product.
In step 1), to the regenerative polyester bottle reclaimed carry out preliminary treatment comprise regenerative polyester bottle sorted, pulverize, clean, the operation such as rinsing, wherein sorting operation is that bottle is transported to sorting arrangement place, this sorting arrangement is different according to the spectral signal of unlike material bottle, adopts infrared spectrum light beam irradiation and carries out sorting process; Polyester bottles after sorting enters disintegrating apparatus and pulverizes; Matting selects different cleaning ways according to the source of bottle: for oil bottle, repeatedly need clean with stronger alkaline warm water; For beverage bottle, weak alkaline aqueous solution is utilized repeatedly to clean.Cleaned bottle sheet carries out predrying again after rinsing.
Step 2) in, predrying good bottle sheet is dropped in vacuumize rotary drum, carries out dynamic low temperature drying, wherein rotary drum capacity 2 ~ 6 tons; Logical steam or admittance deep fat in rotary drum chuck, temperature keeps 100 DEG C ~ 180 DEG C, is preferably 120 DEG C ~ 170 DEG C, is more preferably 130 DEG C ~ 160 DEG C; Rotary drum slowly runs and vacuumizes, 6 ~ 12 hours drying times simultaneously, and dried polyester bottle sheet material moisture controls at below 80ppm.
In step 3), by the polyester bottle sheet material of drying process through screw rod melt extruded time screw rod each district temperature control between 260 DEG C ~ 320 DEG C, be preferably 270 DEG C ~ 300 DEG C, be more preferably 270 DEG C ~ 285 DEG C; In view of bottle chips is not of uniform size and plot ratio is obviously different from conventional section raw material, screw rod is improved, comprise feed zone (spiral groove depth, pitch etc.), the parts such as melt zone, back-mixing section and draw ratio improve, wherein the draw ratio of screw rod is 25 ~ 35, and screw head increases torpedo head or pin, increase mixing usefulness; Screw rod head Stress control is at 12 ~ 20Mpa.Regenerative piece of polyester bottle melt enters primary filter and filters, and the screen pack precision of filter is 60 ~ 150 orders, and filtration temperature is 255 DEG C ~ 310 DEG C, is preferably 260 DEG C ~ 300 DEG C, is more preferably 270 DEG C ~ 280 DEG C.Melt through primary filter enters secondary filter and filters, and the screen pack precision of filter is 100 ~ 250 orders, and filtration temperature is 260 DEG C ~ 300 DEG C, is preferably 265 DEG C ~ 290 DEG C, is more preferably 275 DEG C ~ 285 DEG C; The filtration gross area of filter is 4.0 ~ 8.0m
2.
In step 3), melt after filtration enters spinning manifold through positive battery metering pump, before spinning manifold, pressure remains on 4Mpa ~ 6Mpa, because filament number is up to more than 8dtex, melt is difficult to quick cooling, so the temperature difference of spinning temperature and environment temperature need be reduced, namely need suitably to reduce spinning temperature.Spinning body temperature remains on 255 DEG C ~ 300 DEG C, is preferably 265 DEG C ~ 290 DEG C, is more preferably 270 DEG C ~ 285 DEG C; Filament spinning component comprises different thicknesses sea sand, screen pack, distribution plate, deflector, packing ring and spinnerets in addition, shape of spinneret on wherein said spinnerets (plate face internal diameter 70mm) is " 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.Melt is through ring quenching after spinnerets ejection, and ring blowing is blown for outer shroud, and the bar that better can control fiber is dry, 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 the spinning demand of super-thick denier polyester long filament: strengthen cooling wind speed if one-sided, reduce wind-warm syndrome, super-thick denier polyester filament fiber can be fast because of surface cool, internal cooling is slow and produce " skin-core " structure, ribbon is caused to do, dyeing, stretch by force variation and wait series of problems greatly, and due to inside and outside cooling irregular, super thick dawn flat fiber length and width are caused to shrink irregular, have a strong impact on flatness and the uniformity thereof of fiber, cause the problems such as product quality declines and following process difficulty is large.Therefore, on chilling temperature, cooling wind speed and boundling oil drop choose particularly crucial.Therefore, quench air velocity is preferably 0.5 ~ 1.5m/s by the present embodiment, and ring blowing temperature is preferably 15 ~ 35 DEG C; Oil drop on boundling is displaced downwardly between winding, the boundling point distance that namely oils spinnerets 120cm ~ 200cm; And fiber is flat and comparatively thick, need strengthen oil concentration, reduces friction and causes fiber surface to damage.
In step 3), the tow after the boundling that oils carries out hot gas spring sizing, and tow enters the nozzle of interlace through the 3rd deflector roll again through first, second hot-rolling drawing-off, sizing, and first, second heat roller temperature is respectively 90 ~ 120 DEG C, 170 ~ 190 DEG C.Draw ratio is 1.6 ~ 2.2.The winding speed of coiling and molding is 3000 ~ 4500m/min.The filament number of the super thick dawn recycled polyester flat silk fiber obtained is 8dtex ~ 20dtex; 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 object of the present embodiment is to solve the technical bottleneck utilizing regenerative piece of polyester bottle to produce super thick dawn recycled polyester FDY flat filaments, providing a kind of manufacture method with the super thick dawn recycled polyester FDY flat filaments of the performances such as superior bulkiness, ANTIPILLING, easy dyeing.The present embodiment is optimized improvement to current ultra-coarse denier polyester filament yarn (circular cross-section) process conditions, and utilize regenerative piece of polyester bottle through special process develop meet after road user require, the super thick dawn recycled polyester FDY flat filaments product of function admirable.Its production process is more stable, and the flatness, fracture strength, elongation at break, outward appearance, oil content etc. of the super thick dawn recycled polyester FDY flat filaments good product quality produced, product all can meet rear road processing request, be a kind of there is the high recycled polyester fibre in differentiation of added value.
Embodiment 6.
As shown in Figure 1, utilize the step of the method for regenerative piece of polyester bottle production flat recycled polyester long filament of super thick dawn as follows in the present embodiment.
1) preliminary treatment is carried out to the discarded regenerative polyester bottle reclaimed and obtain polyester bottle slice.
Carry out preliminary treatment to the regenerative polyester bottle reclaimed to comprise and sort regenerative polyester bottle, pulverize, clean and rinsing process, wherein sorting operation is that bottle is transported to sorting arrangement place, this sorting arrangement is different according to the spectral signal of unlike material bottle, adopts infrared spectrum light beam irradiation and carries out sorting process; Polyester bottles after sorting enters disintegrating apparatus and pulverizes, and obtains polyester bottle slice; Matting selects different cleaning ways according to the source of polyester bottles: for oil bottle, repeatedly need clean with stronger alkaline warm water; For beverage bottle, weak alkaline aqueous solution is utilized repeatedly to clean; Cleaned polyester bottle slice carries out predrying again after rinsing.
2) will through pretreated polyester bottle slice through low-temperature vacuum drying process.
Dropped in vacuumize rotary drum by predrying good polyester bottle slice and carry out dynamic low temperature drying, wherein the capacity of rotary drum is 2 ~ 6 tons; Logical steam or admittance deep fat in rotary drum chuck, temperature keeps 100 DEG C ~ 180 DEG C, preferably 120 DEG C ~ 170 DEG C; Rotary drum slowly runs and vacuumizes simultaneously, and 6 ~ 12 hours drying times, the moisture of dried polyester bottle slice controls at below 80ppm.
3) dried polyester bottle slice is oiled through screw rod melt extruded, primary filter, cascade filtration, measuring pump, spinning manifold, filament spinning component, ring quenching, boundling successively, drafting forming and winding doff, step 3) is specific as follows.
A, the polyester bottle slice of drying process is obtained polyester bottle slice melt through screw rod melt extruded, during screw rod melt extruded, the temperature in each district of screw rod controls between 260 DEG C ~ 320 DEG C, preferably controls at 270 DEG C ~ 300 DEG C, more preferably controls at 270 DEG C ~ 285 DEG C; Improve screw rod to overcome the problem that the not of uniform size and plot ratio of polyester bottle slice is obviously different from normal polyester section raw material, the draw ratio of screw rod is 25 ~ 35, screw head is provided with torpedo head or pin for increasing mixing usefulness, and screw rod head Stress control is at 12 ~ 20Mpa; Polyester bottle slice melt enters primary filter and filters, and the screen pack precision of primary filter is 60 ~ 150 orders, and filtration temperature is 255 DEG C ~ 310 DEG C, is preferably 260 DEG C ~ 300 DEG C, is more preferably 270 DEG C ~ 280 DEG C; Polyester bottle slice melt after primary filter enters secondary filter and filters, the screen pack precision of secondary filter is 100 ~ 250 orders, and filtration temperature is 260 DEG C ~ 300 DEG C, is preferably 265 DEG C ~ 290 DEG C, be more preferably 275 DEG C ~ 285 DEG C, the filtration gross area of secondary filter is 4.0 ~ 8.0m
2.
B, filter after polyester bottle slice melt enter spinning manifold with filament spinning component through the measuring pump of supercharging, before spinning manifold, pressure remains on 4Mpa ~ 6Mpa, the temperature of spinning manifold is remained on 255 DEG C ~ 300 DEG C, preferably remain on 265 DEG C ~ 290 DEG C, more preferably remain on 270 DEG C ~ 285 DEG C; Filament spinning component comprises screen pack, the extra large sand of different thicknesses, distribution plate, deflector, packing ring and spinnerets, spinneret orifice on spinnerets is " one " character form structure, the hole sectional dimension of spinneret orifice is 1.5mm × 0.15mm ~ 5.0mm × 0.40mm, the hole depth of spinneret orifice is 0.5mm ~ 1.5mm, namely spinneret orifice is flat rectangular-shaped structure, and the number of spinneret orifice is 8 ~ 24; The plate face internal diameter of spinnerets is generally 70mm.Polyester bottle slice melt through spinnerets ejection after through ring quenching, the wind speed of ring blowing is 0.5 ~ 1.5m/s, the temperature of ring blowing is 15 ~ 35 DEG C, ring blowing adopts the mode of outer-ring ventilation, use outer-ring ventilation dry with the bar controlling fiber, make that tow cooling is even, bar does homogeneous and dyeability good; The boundling point distance that oils spinnerets 120cm ~ 200cm, obtains tow after boundling oils.Because fiber is flat and comparatively thick, need strengthen the oil concentration that boundling oils, cause fiber surface to damage to reduce friction, oil concentration is 8-20%, and this percentage is weight percentage.
Tow after C, the boundling that oils carries out hot gas spring sizing, tow is after the first hot-rolling and the second hot-rolling drawing-off, shaping, enter the nozzle of interlace through the 3rd deflector roll again, the temperature of the first hot-rolling and the second hot-rolling is respectively 90 ~ 120 DEG C and 170 ~ 190 DEG C, and draw ratio is 1.6 ~ 2.2; Tow after drafting forming carries out coiling and molding, and the winding speed of coiling and molding is 3000 ~ 4500m/min, obtains flat recycled polyester long filament of super thick dawn.
The filament number of the flat recycled polyester long filament of super thick dawn adopting the method in the present embodiment to obtain is 8dtex ~ 20dtex, the flatness of fiber is 4.0 ~ 9.0, the bar evenness of fiber is 1.0 ~ 2.0%, and fibrous fracture intensity is 3.8 ~ 5.0cN/dtex, and elongation at break is 25% ~ 40%.
By foregoing description, those skilled in the art can implement the present invention.
Above preferred embodiment, just for instruction and explanation of content of the present invention, does not form the restriction to content of the present invention.Although inventor enumerates in more detail to invention has been, but, the content that those skilled in the art discloses according to summary of the invention part and embodiment, various amendment can be made or/and it is obvious for supplementing or adopting similar mode to substitute to described specific embodiment, and technique effect of the present invention can be realized, therefore, repeat no longer one by one herein.The term occurred in the present invention, for the elaboration of technical solution of the present invention and understanding, is not construed as limiting the invention.
Claims (10)
1. utilize regenerative piece of polyester bottle to produce a method for flat recycled polyester long filament of super thick dawn, it is characterized in that: the step of described method is as follows:
1) preliminary treatment is carried out to the discarded regenerative polyester bottle reclaimed and obtain polyester bottle slice;
2) will through pretreated polyester bottle slice through low-temperature vacuum drying process;
3) dried polyester bottle slice is oiled through screw rod melt extruded, primary filter, cascade filtration, measuring pump, spinning manifold, filament spinning component, ring quenching, boundling successively, drafting forming and winding doff, step 3) is specific as follows:
The polyester bottle slice of drying process is obtained polyester bottle slice melt through screw rod melt extruded, and during screw rod melt extruded, the temperature in each district of screw rod controls between 260 DEG C ~ 320 DEG C; Improve screw rod to overcome the problem that the not of uniform size and plot ratio of polyester bottle slice is obviously different from normal polyester section raw material, the draw ratio of screw rod is 25 ~ 35, screw head is provided with torpedo head or pin for increasing mixing usefulness, and screw rod head Stress control is at 12 ~ 20Mpa; Polyester bottle slice melt enters primary filter and filters, and the screen pack precision of primary filter is 60 ~ 150 orders, and filtration temperature is 255 DEG C ~ 310 DEG C; Polyester bottle slice melt after primary filter enters secondary filter and filters, and the screen pack precision of secondary filter is 100 ~ 250 orders, and filtration temperature is 260 DEG C ~ 300 DEG C, and the filtration gross area of secondary filter is 4.0 ~ 8.0m
2;
Polyester bottle slice melt after filtration enters the spinning manifold with filament spinning component through the measuring pump of supercharging, and before spinning manifold, pressure remains on 4Mpa ~ 6Mpa, the temperature of spinning manifold is remained on 255 DEG C ~ 300 DEG C; Filament spinning component comprises screen pack, the extra large sand of different thicknesses, distribution plate, deflector, packing ring and spinnerets, spinneret orifice on spinnerets is " one " character form structure, the hole sectional dimension of spinneret orifice is 1.5mm × 0.15mm ~ 5.0mm × 0.40mm, the hole depth of spinneret orifice is 0.5mm ~ 1.5mm, and the number of spinneret orifice is 8 ~ 24; Polyester bottle slice melt through spinnerets ejection after through ring quenching, the wind speed of ring blowing is 0.5 ~ 1.5m/s, the temperature of ring blowing is 15 ~ 35 DEG C, ring blowing adopts the mode of outer-ring ventilation, use outer-ring ventilation dry with the bar controlling fiber, make that tow cooling is even, bar does homogeneous and dyeability good; The boundling point distance that oils spinnerets 120cm ~ 200cm, obtains tow after boundling oils;
The tow after boundling that oils carries out hot gas spring sizing, tow is after the first hot-rolling and the second hot-rolling drawing-off, shaping, enter the nozzle of interlace through the 3rd deflector roll again, the temperature of the first hot-rolling and the second hot-rolling is respectively 90 ~ 120 DEG C and 170 ~ 190 DEG C, and draw ratio is 1.6 ~ 2.2; Tow after drafting forming carries out coiling and molding, and the winding speed of coiling and molding is 3000 ~ 4500m/min, obtains flat recycled polyester long filament of super thick dawn.
2. the method utilizing regenerative piece of polyester bottle to produce flat recycled polyester long filament of super thick dawn according to claim 1, it is characterized in that: in step 1), carry out preliminary treatment to the regenerative polyester bottle reclaimed to comprise and sort regenerative polyester bottle, pulverize, clean and rinsing process, wherein sorting operation is that bottle is transported to sorting arrangement place, this sorting arrangement is different according to the spectral signal of unlike material bottle, adopts infrared spectrum light beam irradiation and carries out sorting process; Polyester bottles after sorting enters disintegrating apparatus and pulverizes, and obtains polyester bottle slice; Matting selects different cleaning ways according to the source of polyester bottles: for oil bottle, repeatedly need clean with stronger alkaline warm water; For beverage bottle, weak alkaline aqueous solution is utilized repeatedly to clean; Cleaned polyester bottle slice carries out predrying again after rinsing.
3. the method utilizing regenerative piece of polyester bottle to produce flat recycled polyester long filament of super thick dawn according to claim 1, it is characterized in that: step 2) in, dropped in vacuumize rotary drum by predrying good polyester bottle slice and carry out dynamic low temperature drying, wherein the capacity of rotary drum is 2 ~ 6 tons; Logical steam or admittance deep fat in rotary drum chuck, temperature keeps 100 DEG C ~ 180 DEG C; Rotary drum slowly runs and vacuumizes simultaneously, and 6 ~ 12 hours drying times, the moisture of dried polyester bottle slice controls at below 80ppm.
4. the regenerative piece of polyester bottle that utilizes according to claim 1 or 2 or 3 produces the method for flat recycled polyester long filament of super thick dawn, it is characterized in that: in described step 3), screw rod during screw rod melt extruded each district temperature controls at 270 DEG C ~ 300 DEG C, the filtration temperature of primary filter is 260 DEG C ~ 300 DEG C, the filtration temperature of secondary filter is 265 DEG C ~ 290 DEG C, and the temperature of spinning manifold remains on 265 DEG C ~ 290 DEG C.
5. the regenerative piece of polyester bottle that utilizes according to claim 1 or 2 or 3 produces the method for flat recycled polyester long filament of super thick dawn, and it is characterized in that: in described step 3), the plate face internal diameter of spinnerets is 70mm.
6. the regenerative piece of polyester bottle that utilizes according to claim 1 or 2 or 3 produces the method for flat recycled polyester long filament of super thick dawn, it is characterized in that: in described step 3), because fiber is flat and thicker, the oil concentration that boundling oils need be strengthened, fiber surface is caused to damage to reduce friction, oil concentration is 8-20%, and this percentage is weight percentage.
7. the regenerative piece of polyester bottle that utilizes according to claim 1 or 2 or 3 produces the method for flat recycled polyester long filament of super thick dawn, it is characterized in that: the filament number of described super thick dawn recycled polyester flat silk fiber is 8dtex ~ 20dtex, 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, and elongation at break is 25% ~ 40%.
8. the method utilizing regenerative piece of polyester bottle to produce flat recycled polyester long filament of super thick dawn according to claim 3, is characterized in that: logical steam or admittance deep fat in rotary drum chuck, temperature keeps 120 DEG C ~ 170 DEG C.
9. the method utilizing regenerative piece of polyester bottle to produce flat recycled polyester long filament of super thick dawn according to claim 4, it is characterized in that: each district of screw rod during screw rod melt extruded temperature controls at 270 DEG C ~ 285 DEG C, the filtration temperature of primary filter is 270 DEG C ~ 280 DEG C, the filtration temperature of secondary filter is 275 DEG C ~ 285 DEG C, and the temperature of spinning manifold remains on 270 DEG C ~ 285 DEG C.
10. the flat recycled polyester long filament of super thick dawn, is characterized in that: adopt the method as described in claim as arbitrary in claim 1-9 to obtain.
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