CN107435170A

CN107435170A - A kind of production line and its production method of high-cleanness fine-denier polyamide fiber 6 long filament

Info

Publication number: CN107435170A
Application number: CN201710693297.8A
Authority: CN
Inventors: 董小琳
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-08-14
Filing date: 2017-08-14
Publication date: 2017-12-05

Abstract

The invention discloses a kind of high-cleanness fine-denier polyamide fiber 6 long filament production line and its production method, belong to field of textiles, section production line and long filament spinning production line including front and rear setting, its middle ring Blowing drum is hollow cylinder, the ring Blowing drum side wall is provided with blowing mouths more than three rows in the axial direction, often row's blowing mouth is in sustained height on the ring Blowing drum, the angle of the blowing direction of the blowing mouth and the ring Blowing drum axis direction is 75~85 °, and the screw extruder is provided with seven Mixed Zones.The beneficial effects of the invention are as follows：The design of multiple rows of blowing mouth, go for the cooling for being located at different height strand below spinneret, realize more subgradient cooling effects to strand, the blowing direction of blowing mouth is set up angled, it can so make the strand track under spinneret that more symmetrical arc up and down be presented, effectively prevent the contact and winding between strand.

Description

A kind of production line and its production method of high-cleanness fine-denier polyamide fiber 6 long filament

Technical field

The present invention relates to chemical field, more particularly to a kind of production line and its production method of high-cleanness chinlon 6 filament.

Background technology

Chinlon 6 filament is a kind of conventional synthetic fibers, is widely used in garment market, has good hand touch, wear-resisting, color is firm The features such as high is spent, and fine-denier full-drawn yarn is with more the characteristics of soft, comfortable and easy to wear.General fine denier filament uses two-step method Production, the i.e. first step first produce UDY silks, and second step UDY silks produce full-drawn yarn i.e. DT silks through supercooling stretching.This method Efficiency is low, and cost is high, unstable product quality.

In recent years some enterprises use One-step production Fine Denier Nylon 6 long filament, and production technology is：Section melting-extruder-spray Filament plate-side-blown air cooling-oil nozzle oils-path cooling-pre- interlacing-drawing-off-main interlacing-winding.General drafting multiple is less than 1.3, drafting forming temperature is generally 130~150 DEG C, and the fracture strength of silk is more than 5cN/dtex.

As the improvement of people's living standards, the requirement more and more higher to high-grade dress ornament, by taking knitted fabric as an example, its due to Long filament needs to bear larger pulling force in weaving, and particularly when guide bar shogging is larger, this just needs chinlon filament to have Excellent ultimate strength and elongation at break；Additionally due to knitted fabric shows that its is attractive in appearance by effect of decorative patterns mostly, this needs The long filament of braiding not only has excellent mechanical property, also wants long filament sufficiently fine, the decorative pattern grain effect just meeting so knit out Most preferably.

High-quality fine-denier polyamide fiber 6 is the ideal raw material of the high-grade knitted fabric of braiding, but due to its mechanics at this stage Exist between performance and fineness and mutually restrict, largely have impact on its application in high-grade knitted fabric greatly and produced with it The effect of decorative patterns of knitted fabric.

The content of the invention

To overcome present in prior art the production of polyamide fibre 6 to exist, impurity content is high, second-rate, percent defective is high etc. asks Topic, the invention provides a kind of high-cleanness fine-denier polyamide fiber 6 long filament production line, including the section production line of front and rear setting and long silk spinning Production line processed, long filament spinning production line include successively from front to back cast hopper, feed device, feed hopper, screw extruder, Measuring pump, spinning manifold, ring Blowing drum, oiling roller, draw roll and winding device, the ring Blowing drum are hollow cylinder, The ring Blowing drum side wall is provided with blowing mouths more than three rows in the axial direction, often arranges blowing mouth and is on the ring Blowing drum Sustained height, the angle of the blowing direction of the blowing mouth and the ring Blowing drum axis direction is 75~85 °, and the screw rod squeezes Press is provided with seven Mixed Zones.

Cross air blasting is substituted using ring blowing mode, ring Blowing drum is set in spinneret central lower, and from ring Blowing drum bottom Air intake, wind blow peripherad molten strand from ring Blowing drum side wall, take away the heat in strand, play the work uniformly cooled down With；Additionally due to after strand sprays in spinneret orifice, influenceed by quenching, its temperature gradually reduces, and the present invention is logical Cross and use bottom air inlet mode, the temperature of ring Blowing drum air inlet bottom is lower slightly to its upper, can so ensure in ring air duct The blowing temperature of different height is smaller with the temperature difference of corresponding strand and keeps relative stability, and reduces inside strand because temperature is rapid Become the influence to its mechanical property, improve cooling effectiveness.

Using the design of multiple rows of blowing mouth, go for the cooling for being located at different height strand below spinneret, realize To the more subgradient cooling effects of strand.

In addition, the blowing direction of blowing mouth is set up angled, it can so make the strand rail under spinneret More symmetrical arc up and down is presented in mark, effectively prevent the contact and winding between strand.

Further, the ring Blowing drum is highly 10~15mm, and internal diameter is 50~70mm.

Further, the bore of the blowing mouth is 0.2~0.5mm.

Further, the spinning manifold is provided with the spinneret for spinning, and orifice diameter is on the spinneret 0.1~0.4mm, boundling are highly controlled in 700~900mm.

Further, spinneret orifice uses the annular arrangement using spinneret center as the center of circle, adjacent two annular distances mesopore on spinneret Spacing be arranged to 3-5mm, the spacing per adjacent holes in annular distance is also 3-5mm, and the number of rings in hole is arranged to 12~15.Using this Kind arrangement, can be achieved the arrangement of maximum number spinneret orifice, not only increase spinning efficiency, and for strand in ring blowing technique Uniform decrease in temperature plays an important role.

Further, a diameter of 2-3mm in spinneret central imperforate area, the hole number of turns are 12~15, pitch of holes 3-5mm.

Further, spinneret specification is 4980 holes in the spinning manifold.

Further, the draw roll includes the first draw roll and the second draw roll, the first drawing-off roll surface roughness For 2.5~3.0 μm, the second drawing-off roll surface roughness is 2.0~2.5.

By controlling the roughness of drawing-off roller surface twice, prevent drawing-off roller surface is excessively smooth from strand is beaten in drawing-off Sliding and winding, it is excessively coarse and influence the effect on strand surface to also prevent surface.

Further, the spinning manifold and the oiling roller are setting up and down, and the ring Blowing drum is located at the spinning manifold Among the oiling roller, the axis of the ring Blowing drum is parallel with spinneret orifice spinneret direction on the spinning manifold.

A kind of production method according to above-mentioned production line, it is characterised in that comprise the following steps：

Step 1：The dry chip of polyamide fibre 6 adds cast hopper after opening bag, enters feed hopper by feed device feeding, is squeezed through screw rod Press melting mixing forms spinning melt, and spinning temperature is controlled at 260~280 DEG C, low polymer wherein in dry chip Content is less than 0.03%；

Step 2：Spinning melt is sent to each spinning station through the screw rod head on screw extruder, through measuring pump-metered, quilt Each spinning manifold is uniformly sent to, sprays to form molten strand from spinning manifold spinneret；

Step 3：Strand obtains solid-state strand, the ring blowing uses bottom air inlet mode, wind speed through ring wind quenching Control in 0.5~0.6m/s, temperature control is at 240~255 DEG C；

Step 4：Solid-state strand is through oiling, drawing-off, winder obtain required high-cleanness chinlon 6 filament.

Further, the temperature in the screw extruder seven regions from front to back be respectively 260 DEG C, 275 DEG C, 272 DEG C, 278℃、 280℃、280℃、275℃。

Seven Mixed Zones are set on screw extruder, by the regulation to its interior melt temperature, realize inner melt Uniform mixing, particularly make melt experienced in screw extruder twice heat up and cool, effectively increase wherein polyamide fibre 6 The mixing uniformity of melt.

Further, draft process described in step 4 uses drawing-off twice, and first time drafting multiple is 1.3, is led for the second time Multiple is stretched for 1.1.

Because requirement of the fine-denier polyamide fiber 6 to finished product ultimate strength and uniformity is higher, twice drawing-off is set here, First of drawing-off is dominant draft, changes the strand interior molecules of polyamide fibre 6 orientation, polyamide fibre 6 is preliminarily formed according to the specification requirement of polyamide fibre 6 Frame figure, then by second drawing-off, the specification and uniformity of polyamide fibre 6 are finely adjusted, reaches and reduces the drawing-off of polyamide fibre 6 Power, improve the purpose of fine-denier polyamide fiber 6 mechanical property.

Further, the tension force of chinlon 6 filament is 3.0~5.0N in the draft process.

Further, the weight proportion of each component is as follows in step 1：

Further, the initiator is aminocaproic acid.

Further, the antioxidant be symmetrical phenolic antioxidant, asymmetric phenolic antioxidant, phosphite ester kind antioxidant, One kind in monothioester kind antioxidant, Hinered phenols antioxidant.

Pass through liquid caprolactam and initiator, antioxidant and stabilization agent compound action so that the polyamide fibre 6 finally given into The impurity of product is less, realizes that the accounting of final product mix small molecular polymer reaches less than 1%, improves the use effect of raw material Rate.

Further, when being extracted in the step 5, it is (1-2) to control the mixed proportion of solution and chinlon 6 section：1.

Further, extraction tower top EGR exports out the temperature control of solution at 60-80 DEG C in the step 5；Institute State extraction tower bottom EGR and export out the temperature control of solution at 90-95 DEG C.

Further, when being dried in the step 5, the hot N₂N2 temperature is 130~150 DEG C in drying system, described Second hot N₂The temperature of drying system is 140~160 DEG C.

Further, present invention also offers the chinlon 6 filament production line using above-mentioned production technology.

Further, the drying device includes continuous drying tower, star-like drawing mechanism, cooling feed bin successively from top to bottom, The continuous drying tower top is provided with hot N₂Drying system, the hot N₂Drying system includes the first N₂Filter, first circulation wind Machine, the first N₂Heater, the first N₂Filter inlet is connected with the continuous drying top of tower, the first circulation blower fan Entrance and the first N₂Filter outlet connects, the first N₂Calorifier inlets are connected with the first circulation fan outlet, First N₂Heater outlet is dried with the connection and connected in the middle part of tower side wall.Pass through hot N₂The moisture content of wet slice surface is taken away, And pass through the first N₂Filter removes N₂In moisture content, reuse the first N₂Heater is to N₂Concurrent heating is carried out, is realized to hot N₂Dry N in system₂Recycling.

Further, the second hot N is additionally provided with the continuous drying tower₂Drying system, the 2nd N₂Drying system includes the One heat sink, the second heat sink, second circulation blower fan and the 2nd N₂Heater, the first heat sink entrance with it is described First circulation fan outlet connects, and the second heat sink entrance is connected with first heat sink outlet, and described second Circulating fan entrance is connected with second heat sink outlet, the 2nd N₂Calorifier inlets and the second circulation blower fan Outlet is connected, the 2nd N₂Heater outlet is connected with the continuous drying tower bottom.Second hot N₂Pass through two in drying system Secondary cooling design, makes N₂Temperature be reduced to below dew point, isolate N₂In moisture content, then by heating make N₂Temperature reach 140~160 DEG C, enter from continuous drying tower bottom, redrying is carried out to chinlon 6 section.

Further, second heat sink is provided with condensation zone, and the condensation zone is led to by a plurality of condensation in bending Road forms, every section of condensation passage by multistage condensation section composition, the angle between adjacent two sections of condensation sections is 30~ 60°.By designing condensation zone, make N after cooling₂Baffle plate with each section of condensation section in condensation zone fully contacts, N₂In water Stay in and dew is formed on baffle plate, so as to realize N₂With the separation of moisture content.

Further, the cooling feed bin is provided with N₂Cooling system, the N₂Cooling system includes the 2nd N₂It is filter, cold But blower fan and N₂Cooler, the 2nd N₂Filter inlet with it is described cooling feed bin at the top of be connected, the cooling blower entrance and 2nd N₂Filter outlet is connected, the N₂Cooler entrance is connected with cooling blower outlet, the N₂Cooler goes out Mouth is connected with the cooling bin bottom.By setting N on cooling feed bin₂Cooling system, not only realize to dry chip finished product Cooling, and also achieve drying again to dry chip, further improve the quality of final finished.

Further, the first N₂One layer of moisture content sorbing material is provided with filter, using carbon fibre composite conduct Skeleton, and needling process is used in surface attachment activated carbon granule, the carbon fibre composite, its thickness is in 1cm-5cm, hole The control of gap radius is controlled in 0.05-0.1mm in below 0.5mm, the wherein size of activated carbon granule, and it accounts for carbon fibre composite Less than the 30% of gross mass, preferably 25%.

Further, the extraction equipment follows including head tank, extraction tower, extraction tower top EGR, extraction tower bottom Loop device, pure hot water water supply installation and centrifugal separating device, the head tank are arranged at the top of the extraction tower, the extraction tower Top EGR is arranged on the extraction tower upper area, and extraction tower bottom EGR and the pure hot water supply water and filled Put and be arranged on the extraction tower bottom, the centrifugal separating device charging aperture is connected with the extraction tower bottom, the centrifugation point It is connected from device delivery port with the water inlet of the pure hot water water supply installation.Chinlon 6 section by extraction tower top EGR, Extraction tower bottom EGR liquidates extraction twice, removes most molecular weight polymers of slice surface, extraction tower top Filter is equipped with EGR and extraction tower bottom EGR, the small molecule in recirculated water is gathered by filter Compound is filtered, and molecular weight polymers content of the recirculated water before extraction section is rinsed is less than 0.005%, so as to realize water Recycling.

Further, extraction tower top EGR includes the first delivery pump, first filter and primary heater, institute The first conveying pump intake is stated with being connected at the top of the extraction tower, the first filter entrance pumps out with the described first conveying Mouth is connected, and the primary heater entrance is connected with first filter outlet, the primary heater outlet and the extraction Take and be connected in the middle part of tower.

Further, the first filter is provided with acupuncture filter material, by 40~80wt% polyester fiber and 20~ 60wt% polypropylene fiber obtains through acupuncture, calen-dering process.Using acupuncture filter material, mixed by polyester fiber and polypropylene fiber To close, acupuncture makes mutually to wind between fiber, forms the space structure based on polyester fiber, recycle the melting of polypropylene fiber, Make it that polyester fiber crossover node to be fixed, so as to form firm three dimensions filtration.

Further, the porosity of the acupuncture filter material is 60~90%, and pore diameter is less than 0.3mm.

Further, the thickness of the acupuncture filter material is 0.5~1.5cm, and grammes per square metre is 100~300g/cm²。

Further, the polyester fiber is distributed in more than three kinds of cross fiber type in the range of 0.5~3D using fineness For the polyester fiber quality accounting of composition, wherein fineness more than 1.5D more than 50%, the length of polyester fiber is 37~51mm.

Further, the polypropylene fiber fineness is 1-2D, preferably 2D；Length is 35-48mm, preferably 38mm.Using The polyester fiber of different thicknesses mixes by a certain percentage with polypropylene fiber, by needling process be designed into using polyester fiber as The space structure of network skeleton, then by calen-dering process, polypropylene fiber melting is attached at the crossover node of polyester fiber, shape Into the three dimensions filter frame of stabilized structure, molecular weight polymers of the diameter more than 0.3mm can be effectively prevented to pass through realization pair The filtering of recirculated water.

Further, extraction tower bottom EGR includes secondary heater, the secondary heater entrance with it is described Extraction tower is connected close to bottom sides, and the secondary heater outlet is connected with the extraction tower bottom.

Further, the pure hot water water supply installation includes hopper, the second delivery pump, the second filter, the hopper Water inlet is connected with the centrifugal separating device delivery port, the hopper delivery port and the second delivery pump water inlet phase Even, the second filter water inlet is connected with the delivery pump delivery port, the second filter delivery port and the extraction Tower bottom is connected.Second filter use with first filter identical structure and material, but its fibre fineness for using and Pore diameter is respectively less than first filter, and the fineness of preferred polyester fiber is distributed in more than three kinds in the range of 0.5~3D here Cross fiber type composition, wherein fineness less than 1.5D polyester fiber quality accounting more than 80%, the length of polyester fiber For 37~51mm, and the porosity of the acupuncture filter material is 60~90%, and pore diameter is less than 0.1mm.Due to the first mistake Filter and the second filter are respectively for front and rear extraction and recovery liquid twice, the content and diameter of its recovered liquid small molecular polymer Be in different conditions, be molecular weight polymers content height the characteristics of recovered liquid in the EGR of extraction tower top, diameter compared with Greatly, and molecular weight polymers diameter otherness it is larger, molecular weight polymers quality accounting of its diameter in more than 0.3mm exceedes 60%, thus the target of first filter be mainly realize to these diameters more than 0.3mm molecular weight polymers filtering；And extract The characteristics of taking the recovered liquid in the EGR of tower bottom is then that molecular weight polymers content is relatively low, and diameter is smaller, and small point The otherness of sub- polymer diameter is smaller, and boy of its diameter more than 0.1~0.3 divides polymer quality accounting more than 70%, Therefore the target of the second filter then be realize to diameter more than 0.1mm molecular weight polymers filtering.

Further, the extraction tower bottom water inlet is provided with changeover valve.

Further, the pelleter includes pelletizing case, motor and control cabinet, and being provided with auxiliary in the pelletizing case fixes Chamber, the first insulating, pelletizing chamber and grain-cutter, first insulating is interior to be provided with heating insulation layer, the heating Heat-conducting plate is provided with the inside of heat-insulation layer, heat-conducting plate is connected with auxiliary lock chamber, and auxiliary lock chamber bottom is connected with pelletizing chamber, described to cut Grain knife is located at pelletizing intracavitary, and with aiding in the bottom of lock chamber tangent, the grain-cutter is passed by rotating shaft at the grain-cutter top Pelletizing case is connected with motor, and the inwall of the pelletizing chamber is provided with refrigerating layer.

Wherein, the extruder head is located in auxiliary lock chamber, and an extruding is respectively provided with left and right sides of the auxiliary lock chamber Fixed plate, extruding fixed plate outside connection hydraulic bag, hydraulic bag are connected with hydraulic press.

Further, the extruding fixed plate is transportable that it is solid to move extruding by the expansion of hydraulic bag Fixed board plays fixation to extrusion head, at the same by the effect of hydraulic bag can adjust between two extruding fixed plates away from From.

Wherein, the heating insulation layer heats using water circulation, and the heating insulation layer includes water circulation heating tube, One end connection input pipe of water circulation heating tube, the other end connection efferent duct of the water circulation heating tube, the pelletizing case Side wall is provided with water heater box, and suction pump and heater box are provided with water heater box, and pump mouth and the heater box of the suction pump connect Connect, the delivery port of the suction pump is connected with input pipe, and the heater box is provided with external water pipe and circulating water pipe, circulating water pipe It is connected with efferent duct.

Further, the heater box is provided with upper lid, and upper lid is demountable.

Wherein, the outer layer of the refrigerating layer is provided with the second insulating, and auxiliary heat conduction plate is provided with the inside of the refrigerating layer.

Further, the refrigerating layer is using silicon plate.

Further, what second insulating and the first insulating used is two layers of asbestos and one layer of ring Oxygen tree fat, epoxy resin are located between two layers of asbestos.

Wherein, the grain-cutter includes cutter hub and cutter head, and cutter hub is connected with rotating shaft, at least provided with two knives on the cutter hub Head, cutter head are uniformly distributed on cutter hub.

Further, the rotating shaft is connected by bearing with pelletizing case.

Wherein, the inwall of the pelletizing chamber is provided with temperature sensing device.

Compared with prior art, the beneficial effects of the invention are as follows：

(1) cross air blasting is substituted using ring blowing mode, ring Blowing drum is set in spinneret central lower, and under ring Blowing drum Portion's air intake, wind blow peripherad molten strand from ring Blowing drum side wall, take away the heat in strand, play the work uniformly cooled down With；

(2) after being sprayed due to strand in spinneret orifice, influenceed by quenching, its temperature gradually reduces, this hair It is bright by using bottom air inlet mode, the temperature of ring Blowing drum air inlet bottom is lower slightly to its upper, can so ensure in ring The blowing temperature of air duct different height is smaller with the temperature difference of corresponding strand and keeps relative stability, and reduces inside strand because of temperature Influence of the cataclysm to its mechanical property is spent, improves cooling effectiveness；

(3) spinneret orifice uses the annular arrangement using spinneret center as the center of circle on spinneret, between adjacent two annular distances mesopore Away from 3-5mm is arranged to, the spacing of adjacent holes is also 3-5mm in every annular distance, and the number of rings in hole is arranged to 12~15.Using this row Cloth, the arrangement of maximum number spinneret orifice can be achieved, not only increase spinning efficiency, and dried the uniform of strand in technique for ring Cooling plays an important role；

(4) chinlon 6 section liquidates extraction twice by extraction tower top EGR, extraction tower bottom EGR, goes Except most molecular weight polymers of slice surface, it is all provided with extraction tower top EGR and extraction tower bottom EGR There is filter, the molecular weight polymers in recirculated water are filtered by filter, recirculated water is cut in flushing extraction Molecular weight polymers content before piece is less than 0.005%, so as to realize the recycling of water；

(5) mixed with polypropylene fiber using the polyester fiber of different thicknesses, set by needling process by a certain percentage The space structure using polyester fiber as network skeleton is counted into, then by calen-dering process, polypropylene fiber melting is attached on terylene fibre At the crossover node of dimension, the three dimensions filter frame of stabilized structure is formed, the small molecule that can effectively prevent diameter from being more than 0.3mm Polymer is by realizing the filtering to recirculated water；

(6) it is small in its recovered liquid because first filter and the second filter are respectively for front and rear extraction and recovery liquid twice The content and diameter of Molecularly Imprinted Polymer are in different conditions, are small point the characteristics of recovered liquid in the EGR of extraction tower top Sub- polymer content is high, is relatively large in diameter, and the otherness of molecular weight polymers diameter is larger, and its diameter is in the small of more than 0.3mm Molecule aggregation amount of substance accounting is more than 60%, therefore the target of first filter is mainly realized to these diameters in more than 0.3mm The filtering of molecular weight polymers；And the characteristics of recovered liquid in the EGR of extraction tower bottom is then molecular weight polymers content phase To relatively low, diameter is smaller, and the otherness of molecular weight polymers diameter is smaller, and boy of its diameter more than 0.1~0.3 point is poly- Compound quality accounting is more than 70%, therefore the target of the second filter is realized to diameter in more than 0.1mm molecular weight polymers Filtering；

(7) hot N is passed through₂The moisture content of wet slice surface is taken away, and passes through the first N₂Filter removes N₂In moisture content, then make With the first N₂Heater is to N₂Concurrent heating is carried out, is realized to hot N₂N in drying system₂Recycling；

(8) second hot N₂Designed in drying system by reducing temperature twice, make N₂Temperature be reduced to below dew point, isolate N₂In moisture content, then by heating make N₂Temperature reach 140~160 DEG C, from continuous drying tower bottom enter, to chinlon 6 section Carry out redrying；

(9) by designing condensation zone, N after cooling is made₂Baffle plate with each section of condensation section in condensation zone fully contacts, N₂In water stay in dew formed on baffle plate, so as to realize N₂With the separation of moisture content；

(10) by setting N on cooling feed bin₂Cooling system, the cooling to dry chip finished product is not only realized, and Drying again to dry chip is realized, further improves the quality of final finished.

Brief description of the drawings

Fig. 1 is the present invention preferably chinlon 6 filament spinning technique flow chart；

Fig. 2 is the present invention preferably ring blow structure figure；

Fig. 3 is the present invention preferably chinlon 6 section production line structure chart；

Fig. 4 is the present invention preferably extraction equipment structure chart；

Fig. 5 is the present invention preferably drying device structure chart；

Fig. 6 is the present invention preferably condensation zone structure chart；

Fig. 7 is the present invention preferably pelleter structure chart；

Fig. 8 is the present invention preferably pelleter partial sectional view；

Fig. 9 is the side view of preferably grain-cutter of the invention.

Embodiment

Below in conjunction with drawings and examples, the present invention will be described in further detail.It is it should be appreciated that described herein Specific embodiment only to explain the present invention, is not intended to limit the present invention.

The production method of high-cleanness fine-denier polyamide fiber 6 long filament, includes section production successively and long filament spins two techniques, such as schemes 1 show the present invention, and preferably chinlon 6 filament spinning technique flow chart, processing step are as follows：

Step 1：The dry chip of polyamide fibre 6 adds cast hopper 81 after opening bag, enters feed hopper 83 by the feeding of feed device 82, passes through The melting mixing of screw extruder 84 forms spinning melt, and spinning temperature is controlled at 260~280 DEG C, wherein low molecule in dry chip The content of polymer is less than 0.03%；

Step 2：Spinning melt is sent to each spinning station through the screw rod head on screw extruder 84, is counted through measuring pump 85 Amount, is uniformly sent to each spinning manifold 86, sprays to form molten strand from the spinneret of spinning manifold 86, spinneret orifice on spinneret A diameter of 0.1~0.4mm, boundling are highly controlled in 700~900mm；

Step 3：Strand obtains solid-state strand, the ring blowing uses bottom air inlet mode, air intake through ring wind quenching Mouthfuls 872 are located at the lower end of ring Blowing drum 87, and the height of ring Blowing drum 87 is 10~15mm, and internal diameter is 50~70mm, blast velocity control In 0.5~0.6m/s, temperature control is at 240~255 DEG C；

Step 4：Required for solid-state strand oils through oiling roller 88, the drawing-off of draw roll 89, the winder of winding device 90 obtain High-cleanness chinlon 6 filament.

As a preferred embodiment, a diameter of 2-3mm in spinneret central imperforate area, the hole number of turns is 12~ 15, pitch of holes 3-5mm.

Spinneret orifice uses the annular arrangement using spinneret center as the center of circle on spinneret, and the spacing of adjacent two annular distances mesopore is set 3-5mm is set to, the spacing of adjacent holes is also 3-5mm in every annular distance, and the number of rings in hole is arranged to 12~15.Using this arrangement, The arrangement of maximum number spinneret orifice can be achieved, not only increase spinning efficiency, and for the uniform drop of strand in ring blowing technique Temperature plays an important role.

As shown in Fig. 2 as a preferred embodiment, the side wall of ring Blowing drum 87 is provided with three rows in the axial direction Blowing mouth 871 above, often arrange blowing mouth 871 and be in sustained height on the ring Blowing drum 87.

Using the design of multiple rows of blowing mouth 871, go for the cooling for being located at different height strand below spinneret, it is real More subgradient cooling effects to strand are showed.

As a preferred embodiment, the bore of the blowing mouth 871 is 0.2~0.5mm.

As a preferred embodiment, the blowing direction of the blowing mouth 871 and the ring Blowing drum axis direction Angle be 75~85 °.The blowing direction of blowing mouth is set up angled, can so make the strand under spinneret More symmetrical arc up and down is presented in track, effectively prevent the contact and winding between strand.

As a preferred embodiment, spinneret specification is 4980 holes in the spinning manifold.

As a preferred embodiment, the temperature in the screw extruder seven regions from front to back is respectively 260 ℃、275 ℃、272℃、278℃、280℃、280℃、275℃。

As a preferred embodiment, draft process described in step 4 uses drawing-off twice, first time drawing-off times Number is 1.3, and second of drafting multiple is 1.1.

As a preferred embodiment, the draw roll table that first time drawing-off uses in draft process described in step 4 Surface roughness is 2.5~3.0 μm, and the drawing-off roll surface roughness that second of drawing-off uses is 2.0~2.5.

As a preferred embodiment, the tension force of chinlon 6 filament is 3.0~5.0N in the draft process.

The present embodiment preferably chinlon 6 section production line structure chart is illustrated in figure 3, chinlon 6 section production technology includes Following steps：

Step 1：By liquid caprolactam, initiator, delustering agent, stabilization agent and antioxidant in static mixer 1 fully Mixing, mixing temperature are 90~150 DEG C, and incorporation time is controlled in 1-3h；

Step 2：By well mixed composition successively through evaporating reactor 2 and tubular reactor 3, slow heating makes group The temperature of compound progressively increases to more than 250 DEG C, controls between 250~270 DEG C, wherein the temperature of evaporation reactor 2 is 260 ~270 DEG C, the temperature of tubular reactor 3 is 250~260 DEG C, the pressure of adjustment control evaporation reactor 2 and tubular reactor 3 For 2-4bar, reaction time 3-5h；

Step 3：Pass through finished product reactor 4 again, temperature control is at 230~250 DEG C, and pressure 1-2bar, time control is in 5- 7h, obtain the final product mix of polyamide fibre 6；

Step 4：The final product mix of polyamide fibre 6 is plastified through screw extruder 5 and extruded, then is cut into chinlon 6 section through pelleter 6；

Step 5：Chinlon 6 section is extracted through extraction equipment 7 again, is removed the low polymer in section, is made its low The content of Molecularly Imprinted Polymer is less than 0.03%, then processing is dried through drying device 8 to wet section, obtains required polyamide fibre 6 sections.

As a preferred embodiment, the weight proportion of each component is as follows in step 1：

As a preferred embodiment, the initiator is aminocaproic acid.

As a preferred embodiment, the antioxidant is symmetrical phenolic antioxidant, asymmetric phenolic antioxidant, Asia One kind in phosphoric acid ester antioxidant, monothioester kind antioxidant, Hinered phenols antioxidant.

As a preferred embodiment, when being extracted in the step 5, the mixing ratio of solution and chinlon 6 section is controlled Example is (1-2)：1.

As a preferred embodiment, extraction tower top EGR exports out the temperature of solution in the step 5 Control is at 60-80 DEG C；Extraction tower bottom EGR exports out the temperature control of solution at 90-95 DEG C.

As a preferred embodiment, when being dried in the step 5, the hot N₂N2 temperature in drying system For 130~150 DEG C, the second hot N₂The temperature of drying system is 140~160 DEG C.

As shown in figure 4, the extraction equipment 7 includes head tank 11, extraction tower 12, extraction tower top EGR 13, extraction Tower bottom EGR 14, pure hot water water supply installation 15 and centrifugal separating device 16 are taken, the head tank 11 is arranged on the extraction The top of tower 12 is taken, extraction tower top EGR 13 is arranged on the upper area of extraction tower 12, the extraction tower bottom EGR 14 and the pure hot water water supply installation 15 are arranged on the bottom of extraction tower 12, and the centrifugal separating device 16 is fed Mouth is connected with the bottom of extraction tower 12, and the delivery port of centrifugal separating device 16 enters water with the pure hot water water supply installation 15 Mouth is connected.

Extraction that chinlon 6 section passes through extraction tower top EGR 13, extraction tower bottom EGR 14 liquidates twice, goes Except most molecular weight polymers of slice surface, in extraction tower top EGR 13 and extraction tower bottom EGR 14 Filter is equipped with, the molecular weight polymers in recirculated water are filtered by filter, recirculated water is being rinsed extraction The molecular weight polymers content before section is taken to be less than 0.005%, so as to realize the recycling of water.

As a preferred embodiment, extraction tower top EGR 13 includes the first delivery pump 17, first Filter 18 and primary heater 19, the entrance of the first delivery pump 17 are connected with the top of the extraction tower 12, and described the The entrance of one filter 18 is connected with first delivery pump 17 outlet, the entrance of primary heater 19 and the first filter 18 outlets are connected, and the outlet of primary heater 19 is connected with the middle part of extraction tower 12.

As a preferred embodiment, the first filter 18 is provided with acupuncture filter material, by 40~ 80wt% polyester fiber obtains with 20~60wt% polypropylene fiber through acupuncture, calen-dering process.

Using acupuncture filter material, mixed by polyester fiber with polypropylene fiber, acupuncture makes mutually to wind between fiber, is formed Space structure based on polyester fiber, the melting of polypropylene fiber is recycled, it is consolidated polyester fiber crossover node It is fixed, so as to form firm three dimensions filtration.

As a preferred embodiment, by optimizing design to acupuncture filter material, its filter efficiency is improved, The porosity of the acupuncture filter material is 60~90%, and pore diameter is less than 0.3mm.The thickness of the acupuncture filter material is 0.5~1.5cm, grammes per square metre are 100~300g/cm².The polyester fiber is distributed in three kinds in the range of 0.5~3D using fineness Cross fiber type composition above, wherein fineness are more than 1.5D polyester fiber quality accounting more than 50%, polyester fiber Length is 37~51mm.The polypropylene fiber fineness is 1-2D, preferably 2D；Length is 35~48mm, preferably 38mm.

Mixed with polypropylene fiber using the polyester fiber of different thicknesses, be designed into by needling process by a certain percentage Space structure using polyester fiber as network skeleton, then by calen-dering process, polypropylene fiber melting is attached on polyester fiber At crossover node, the three dimensions filter frame of stabilized structure is formed, can effectively prevent small molecule of the diameter more than 0.3mm from polymerizeing Thing is by realizing the filtering to recirculated water.

As a preferred embodiment, extraction tower bottom EGR 14 includes secondary heater 21, it is described The entrance of secondary heater 21 is connected with the extraction tower 12 close to bottom sides, the outlet of secondary heater 21 and the extraction The bottom of tower 12 is connected.

As a preferred embodiment, the pure hot water water supply installation 15 include hopper 22, the second delivery pump 23, Second filter 24, the water inlet of hopper 22 are connected with the delivery port of centrifugal separating device 16, and the hopper 22 goes out The mouth of a river is connected with the water inlet of the second delivery pump 23, the water inlet of the second filter 24 and the water outlet of the second delivery pump 24 Mouth is connected, and the delivery port of the second filter 24 is connected with the bottom of extraction tower 12.

Second filter 24 using and first filter identical structure and material, but its fibre fineness for using and hole Gap diameter is respectively less than first filter, and the fineness of preferred polyester fiber is distributed in more than three kinds in the range of 0.5~3D here Cross fiber type forms, and more than 80%, the length of polyester fiber is wherein polyester fiber quality accounting of the fineness less than 1.5D 37~51mm, and the porosity of the acupuncture filter material is 60~90%, pore diameter is less than 0.1mm.Due to the first filtering Extraction and recovery liquid, the content and diameter of its recovered liquid small molecular polymer are equal twice for before and after respectively for device and the second filter In different conditions, it is molecular weight polymers content height the characteristics of recovered liquid in the EGR of extraction tower top, is relatively large in diameter, And the otherness of molecular weight polymers diameter is larger, molecular weight polymers quality accounting of its diameter in more than 0.3mm exceedes 60%, thus the target of first filter be mainly realize to these diameters more than 0.3mm molecular weight polymers filtering；And extract The characteristics of taking the recovered liquid in the EGR of tower bottom is then that molecular weight polymers content is relatively low, and diameter is smaller, and small point The otherness of sub- polymer diameter is smaller, and boy of its diameter more than 0.1~0.3 divides polymer quality accounting more than 70%, Therefore the target of the second filter then be realize to diameter more than 0.1mm molecular weight polymers filtering.

As a preferred embodiment, the bottom water inlet of extraction tower 12 is provided with changeover valve 25.

The present invention preferably drying device structure chart is illustrated in figure 5, the drying device 8 includes connecting from top to bottom successively Continuous drying tower 31, star-like drawing mechanism 32, cooling feed bin 33, the continuous drying top of tower 31 is provided with hot N₂Drying system 34, The hot N₂Drying system 34 includes the first N₂Filter 37, first circulation blower fan 38, the first N₂Heater 39, the first N₂ The entrance of filter 37 is connected with the continuous drying top of tower 31, the entrance of first circulation blower fan 38 and the first N₂Cross The outlet of filter 37 connection, the first N₂The entrance of heater 39 connects with the first circulation blower fan 38 outlet, the first N₂Add The hot outlet of device 39 in the middle part of the connection side wall of drying tower 31 with connecting.Pass through hot N₂The moisture content of wet slice surface is taken away, and is passed through First N₂Filter removes N₂In moisture content, reuse the first N₂Heater is to N₂Concurrent heating is carried out, is realized to hot N₂In drying system N₂Recycling.

As a preferred embodiment, the second hot N is additionally provided with the continuous drying tower 31₂Drying system 35, institute State the 2nd N₂Drying system 35 includes the first heat sink 40, the second heat sink 41, the N of second circulation blower fan 46 and the 2nd₂Heating Device 42, the entrance of the first heat sink 40 connect with the first circulation blower fan 38 outlet, and second heat sink 41 enters Mouthful export and to be connected with first heat sink 40, the entrance of second circulation blower fan 46 goes out with institute the second heat sink of art 41 Mouth is connected, the 2nd N₂The entrance of heater 42 is connected with the second circulation blower fan 46 outlet, the 2nd N₂Heater 42 goes out Mouth is connected with the continuous drying bottom of tower 31.Second hot N₂Designed in drying system by reducing temperature twice, make N₂Temperature reduce To below dew point, N is isolated₂In moisture content, then by heating make N₂Temperature reach 140~160 DEG C, from continuous drying bottom of towe Portion enters, and redrying is carried out to chinlon 6 section.

As a preferred embodiment, second heat sink 41 is provided with condensation zone 47, the condensation zone 47 It is made up of a plurality of in the condensation passage 48 of bending, every section of condensation passage 48 forms by multistage condensation section 49, phase Angle between adjacent two sections of condensation section 49 is 30~60 °.By designing condensation zone, make N after cooling₂It is in condensation zone and each The baffle plate of section condensation section fully contacts, N₂In water stay in dew formed on baffle plate, so as to realize N₂With the separation of moisture content.

As a preferred embodiment, the cooling feed bin 33 is provided with N₂Cooling system 36, the N₂Cooling system 36 include the 2nd N₂Filter 43, cooling blower 44 and N₂Cooler 45, the 2nd N₂The entrance of filter 43 is expected with the cooling The top of storehouse 33 is connected, the entrance of cooling blower 44 and the 2nd N₂The outlet of filter 43 is connected, the N₂The entrance of cooler 45 It is connected with the cooling blower 44 outlet, the N₂Cooler 45 exports to be connected with cooling feed bin 33 bottom.By cold N is but set on feed bin₂Cooling system, the cooling to dry chip finished product is not only realized, and also achieved to dry chip again Dry, further improve the quality of final finished.

As a preferred embodiment, the first N₂One layer of moisture content sorbing material is provided with filter 37, is used Carbon fibre composite uses needling process as skeleton, and in surface attachment activated carbon granule, the carbon fibre composite, Its thickness in 1cm~5cm, pore radius control in below 0.5mm, wherein the size control of activated carbon granule 0.05~ 0.1mm, it accounts for less than the 30% of carbon fibre composite gross mass, preferably 25%.

Shown in Fig. 7 and Fig. 8, pelleter is provided with screw extruder 5, and the bottom of screw extruder 5 is provided with extruder head 52, extrusion First 52 are connected with pelleter, and pelleter includes pelletizing case 53, motor 55 and control cabinet 56, and auxiliary is provided with the pelletizing case 53 Lock chamber 60, the first insulating 61, pelletizing chamber 70 and grain-cutter 74, first insulating 71 is interior to be provided with heating guarantor Warm layer, the heating insulation layer inner side are provided with heat-conducting plate, and heat-conducting plate is connected with auxiliary lock chamber 60, auxiliary lock chamber 60 bottom It is connected with pelletizing chamber 70, the grain-cutter 74 is located in pelletizing chamber 70, the top of grain-cutter 74 and the bottom of auxiliary lock chamber 60 Portion is tangent, and the raw material of polyamide fibre 6 that the extruder head 52 being easy in compensated cavity 60 is extruded more preferably can be more accurately cut, the pelletizing Knife 74 passes pelletizing case 53 by rotating shaft 76 and is connected with motor 55, and the inwall of the pelletizing chamber 70 is provided with refrigerating layer 72, system Cooling layer 52 can carry out refrigerating operation so that the temperature in pelletizing chamber 70 reduces, and ensures the normal operation of pelletizing.

As a preferred embodiment, as shown in figure 8, the extruder head 52 be located at auxiliary lock chamber 60 in, it is described The left and right sides of auxiliary lock chamber 60 is respectively provided with an extruding fixed plate 59, the outside connection hydraulic bag 58 of extruding fixed plate 59, hydraulic pressure Capsule 58 is connected with hydraulic press 57, and extruding fixed plate 59 is transportable, can be moved by the expansion of hydraulic bag 58 crowded Pressure fixed plate 59 plays fixation to extrusion head, while can adjust two extruding fixed plates 59 by the effect of hydraulic bag 58 The distance between, have the function that the extruder head 52 of fixed different-diameter, expand the PVC pelletizings at the aspect of screw extruder 5 The scope of application of machine.

As a preferred embodiment, as shown in figure 8, the heating insulation layer heats using water circulation, water The boiling point of circulating-heating reclaimed water is 100 DEG C, and can avoiding heating insulation layer, temperature will not too high or mistake when carrying out preheating insulation It is low, not easy-formation after liquid extrusion when avoiding temperature too high, while raw material is produced on extruder head 52 and coagulated when avoiding temperature too low The phenomenon blocked is tied, the heating insulation layer includes water circulation heating tube 69, one end connection input pipe of water circulation heating tube 69 63, the other end connection efferent duct 62 of the water circulation heating tube 69, the side wall of the pelletizing case 53 is provided with water heater box 54, Suction pump 64 and heater box 65 are provided with water heater box 54, the pump mouth of the suction pump 64 is connected with heater box 65, described to take out The delivery port of water pump 64 is connected with input pipe 63, and the heater box 65 is provided with external water pipe 67 and circulating water pipe 68, recirculated water Pipe 68 is connected with efferent duct 62, by by efferent duct 62 and circulating water pipe 68 by by the surplus warm water having surplus heat after again Heated in injection heating case 65 so that remaining heat can be utilized again in warm water, and reduction heats the water to same Required heat during temperature, resource consumption is reduced, strengthen the effective rate of utilization of resource.

As a preferred embodiment, the heater box 65 is provided with upper lid 66, upper lid 66 be it is demountable, this Kind set can personnel easy to operation carry out cleaning maintenance to the inwall of heater box 65, ensure the normal operation of heater box 65, keep away Exempt from caused incrustation scale etc. in heater box 65 to impact heat transfer.

As a preferred embodiment, the outer layer of the refrigerating layer 72 is provided with the second insulating 79, the system The inner side of cooling layer 72 is provided with auxiliary heat conduction plate 71, and auxiliary heat conduction plate 71 can both conduct low temperature so that the temperature drop in pelletizing chamber 70 It is low so that the fast shaping after pelletizing of polyamide fibre 6 drops, and reduces the probability that raw material is adhered on grain-cutter 74, while auxiliary heat conduction Plate 71 can play a part of protection to refrigerating layer 72, avoid particle during pelletizing from being made by inertia force and the revolving force of grain-cutter 74 Struck with splashing everywhere on refrigerating layer 72, ensure the service life of refrigerating layer 72.

As a preferred embodiment, the refrigerating layer 22, using silicon plate, silicon plate, which is powered, to freeze, and enhances this The practicality of pelleter.

As a preferred embodiment, the insulating 61 of the second insulating 79 and first use is equal Two layers of asbestos and one layer of epoxy resin, epoxy resin is located between two layers of asbestos, it is this it is sandwich be designed to preferably It is thermally shielded insulation.

As a preferred embodiment, as shown in figure 9, the grain-cutter 74 includes cutter hub 77 and cutter head 78, cutter hub 77 are connected with rotating shaft 76, are uniformly distributed on the cutter hub 77 at least provided with two cutter heads 78, cutter head 78 on cutter hub 77 so that Chinlon 6 section it is in the same size, ensure the effect of pelletizing.

As a preferred embodiment, the rotating shaft 76 is connected by bearing 75 with pelletizing case 53, facilitate rotating shaft 76 Rotation.

As a preferred embodiment, the inwall of the pelletizing chamber 70 is provided with temperature sensing device 73, it is easy to pair Temperature in pelletizing chamber 70 is monitored, and guarantee reaches temperature needed for pelletizing.

The operation principle of pelleter of the present invention is：Extruder head 52 is inserted into auxiliary lock chamber 60, hydraulic press 57 Control hydraulic bag 58 starts to expand so that inwardly extruding is formed admittedly the extruding fixed plate 59 of auxiliary lock chamber 60 both sides to extruder head Fixed, after the completion of fixed, heater box 65 is started working, and suction pump 64 is taken out hot water out of heater box 65 and followed by input pipe 63 into water In ring heating tube 69, water circulation heating tube 19 is transferred heat into auxiliary lock chamber 60 by heat-conducting plate and is applied to extruder head On 52, play a part of preheating insulation to extruder head 52, control cabinet 56 controls the silicon plate energization of refrigerating layer 72 to start to freeze, simultaneously Transmitted by auxiliary heat conduction plate 71 so that the temperature in pelletizing room 70 reduces, and senses pelletizing chamber 70 using temperature sensing device 73 Interior temperature, when temperature drops to 10 DEG C, the control motor 55 of control cabinet 56 begins through rotating shaft 76 and drives grain-cutter 74 to revolve Turn, cutter head 78 also rotates with, and passes through the purpose for being constantly rotated up to continuous pelletizing of cutter head 78.

The pelleter it is rational in infrastructure, heating insulation layer is located in pelletizing case 53, avoids heated extrusion head 52 from extruding Influenceed to produce to condense by outer low temperature during PVC raw materials and produce blocking, ensure the normal work of extruder head 52, meanwhile, avoid Restriction is produced to the thickness of extruder head 52 when heating insulation layer is located at into extrusion 2, reduces the target of heating insulation layer Scope；Freezed in the present invention from silicon plate, can effectively avoid wind refrigeration modes from causing chinlon 6 section top layer easy Embrittlement, the phenomenon of the sputters particles of polyamide fibre 6 cut, while the particle that it also avoid cutting during water cooling needs carrying out drying behaviour Make step, simplify operation so that pelletizing enhanced convenience, operating efficiency are higher.

The preferred embodiments of the present invention have shown and described in described above, as previously described, it should be understood that the present invention is not office Be limited to form disclosed herein, be not to be taken as the exclusion to other embodiment, and available for various other combinations, modification and Environment, and can be changed in the scope of the invention is set forth herein by the technology or knowledge of above-mentioned teaching or association area It is dynamic., then all should be appended by the present invention and the change and change that those skilled in the art are carried out do not depart from the spirit and scope of the present invention In scope of the claims.

Claims

1. a kind of high-cleanness fine-denier polyamide fiber 6 long filament production line, it is characterised in that section production line and long filament including front and rear setting Production line is spinned, the long filament spinning production line includes cast hopper, feed device, feed hopper, screw extruding successively from front to back Machine, measuring pump, spinning manifold, ring Blowing drum, oiling roller, draw roll and winding device, the ring Blowing drum are hollow cylinder Shape, the ring Blowing drum side wall are provided with blowing mouths more than three rows in the axial direction, often arrange blowing mouth and are in the ring blowing Sustained height on cylinder, the angle of the blowing direction of the blowing mouth and the ring Blowing drum axis direction is 75~85 °, the spiral shell Bar extruder is provided with seven Mixed Zones.

A kind of 2. high-cleanness fine-denier polyamide fiber 6 long filament production line according to claim 1, it is characterised in that the ring blowing Cylinder height is 10~15mm, and internal diameter is 50~70mm.

A kind of 3. high-cleanness fine-denier polyamide fiber 6 long filament production line according to claim 2, it is characterised in that the blowing mouth Bore be 0.2~0.5mm.

A kind of 4. high-cleanness fine-denier polyamide fiber 6 long filament production line according to claim 3, it is characterised in that the manifold Body is provided with the spinneret for spinning, and orifice diameter is 0.1~0.4mm on the spinneret, and boundling is highly controlled 700 ~900mm.

A kind of 5. high-cleanness fine-denier polyamide fiber 6 long filament production line according to claim 4, it is characterised in that the spinneret The a diameter of 2-3mm in central imperforate area, the hole number of turns are 12~15, pitch of holes 3-5mm.

A kind of 6. high-cleanness fine-denier polyamide fiber 6 long filament production line according to claim 5, it is characterised in that the manifold Spinneret specification is 4980 holes in body.

A kind of 7. high-cleanness fine-denier polyamide fiber 6 long filament production line according to claim 6, it is characterised in that the draw roll Including the first draw roll and the second draw roll, the first drawing-off roll surface roughness is 2.5~3.0 μm, second drawing-off Roll surface roughness is 2.0~2.5.

A kind of 8. high-cleanness fine-denier polyamide fiber 6 long filament production line according to claim 7, it is characterised in that the manifold Body and the oiling roller are setting up and down, and the ring Blowing drum is located among the spinning manifold and the oiling roller, and the ring blows The axis of air duct is parallel with spinneret orifice spinneret direction on the spinning manifold.

9. a kind of production method according to any one of the claim 1-8 production lines, it is characterised in that comprise the following steps：

Step 1：The dry chip of polyamide fibre 6 adds cast hopper after opening bag, enters feed hopper by feed device feeding, through screw extruder Melting mixing forms spinning melt, and spinning temperature is controlled at 260~280 DEG C, the content of low polymer wherein in dry chip Less than 0.03%；

Step 2：Spinning melt is sent to each spinning station through the screw rod head on screw extruder, uniform through measuring pump-metered Each spinning manifold is sent to, sprays to form molten strand from spinning manifold spinneret；

Step 3：Strand obtains solid-state strand, the ring blowing uses bottom air inlet mode, blast velocity control through ring wind quenching In 0.5~0.6m/s, temperature control is at 240~255 DEG C；

10. production method according to claim 9, it is characterised in that the screw extruder seven regions from front to back Temperature be respectively 260 DEG C, 275 DEG C, 272 DEG C, 278 DEG C, 280 DEG C, 280 DEG C, 275 DEG C.