CN103074739B - Production method for polypropylene spun-bonded needle-punched geotextile - Google Patents
Production method for polypropylene spun-bonded needle-punched geotextile Download PDFInfo
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Abstract
A production method for a polypropylene spun-bonded needle-punched geotextile mainly includes the following steps: polypropylene chips are conveyed into a screw extruder and extruded out, the melt enters a spinning manifold via a filter, and is measured and extruded into filaments by a spinneret plate, the filaments are cooled by cross wind, drafted by duct airflow, then separated, swayed and formed into a web on a lapper, the web is outputted to a needle machine and needled to be bound, and after tension is adjusted, the web is trimmed and rolled, so that the polypropylene spun-bonded needle-punched geotextile is formed. Various processes after spinning, such as bundle stretching, rolling, drying, shaping, cutting off, packing, unpacking, blending, carding and web forming, are dispensed, consequently, the production process is greatly shortened, the production cost is lower, and the production efficiency is higher; the product has higher strength and better uniformity, thermal shrinkage and various indexes are more stable, and the product is incomparable with polypropylene staple geotextile and the like.
Description
Technical field
The present invention relates to a kind of preparation method of synthetic fiber nonwoven products.
Background technology
Those skilled in the art knows, geotextiles has filtration, draining, isolation and the function such as reinforcing, enhancing, and for this reason, geotextiles becomes the fourth-largest construction material after China's reinforcing bar, cement, timber.At present, the polypropylene geotextile production technology of China mainly adopts polypropylene chopped fiber to make geotextiles through carding, cross lapping, acupuncture consolidation.Polypropylene chopped fiber is cut into slices by screw extruder melt spinning by polypropylene fibre, through cooling, boundling, winding, doff form primery vascular bundle, again by multiple primery vascular bundle boundling again, through after-drawing, curling, the operations such as sizing drying, cut-out, packing make finished product staple fibre, this process is made up of two-step process, and be completed by the chemical fibre factory of specialty, production polypropylene chopped fiber.After finished product short fiber is transported to polypropylene geotextile factory, make polypropylene geotextile through operations such as shredding, carding, cross lapping, acupuncture consolidation, trimming windings.Its weak point is: 1, the production procedure of short fiber polypropylene geotextile is long, and production efficiency is low, and energy consumption is large.2, because this technique first polypropylene fiber is cut to staple fibre, carding, acupuncture are consolidated into non-weaving cloth again, the tension brute force of cloth cover and extension at break (percentage elongation) are inevitably affected, thus constrain the partial properties index of polypropylene geotextile.
Summary of the invention
The object of the present invention is to provide that a kind of process is simple, production efficiency is high, the production method of the polypropylene spunbond needle-punched geotextiles of less energy consumption, good product quality.The method is for raw material with polypropylene (polypropylene fibre or PP), one-step method directly makes polypropylene spunbond needle-punched geotextiles, namely melt extrude through delivering into screw extruder, enter spinning manifold after being filtered, be spun into filament through metering from spinnerets ejection, cooled by lateral blowing, through sub-wire, pendulum wire after chimneying drawing-off, lapper forms fiber web, and fibre web is exported to needing machine and carry out acupuncture consolidation, trimming rolling forms polypropylene spunbond needle-punched geotextiles.
Polymer of the present invention is isotactic structure, and melt index is greater than 15, and it can be polymer chips, polymer powders or take isotactic polypropylene as main body through the mixture of chemistry or physical modification.
The process conditions that the present invention respectively walks operation are as follows:
(1) melt extrude: screw extruder temperature: 160 ~ 280 DEG C, the confidential employing compounding effect of best screw extruding is good, the polypropylene fibre screw extruder of big L/D ratio, the draw ratio of screw extruder is greater than 28, the time of staying of such material in screw extruder is longer, material plasticizing more abundant, is conducive to spinning.
(2) spinning: spinning temperature: 225 ~ 290 DEG C, to ensure that the cloth cover of polypropylene spunbond needle-punched geotextiles is powerful, acupuncture consolidation effect and conservancy property requirement.Best filament number controls between 4 ~ 12dpf, and to ensure the physical indexs such as product cloth cover brute force, best strength of filament is greater than 4.2CN/dtex.
(3) cool: lateral blowing wind speed: 0.5 ~ 1.2m/s, lateral blowing temperature: 14 ~ 20 DEG C, lateral blowing humidity: more than 70%.
(4) air drawing: air drawing speed is greater than 4500m/min, preferably adopts pipe type air flow drawing device.
(5) sub-wire, pendulum wire: the frequency of pendulum wire device is greater than 800n/min, the pendulum wire device amplitude of oscillation is greater than 40mm, to ensure the uniformity of cloth cover and less in length and breadth to brute force ratio.
(6) become net: the suction net wind speed on lapping machine is greater than 8m/s, to offset the impact of high speed attenuating blast to fibre web, avoid turning over net phenomenon and occur, ensure the stable of product.
(7) pre-needling: pre-needling bestock: 4000 ~ 6000 pins/rice, pre-needling frequency 600 ~ 1800 beats/min, pre-needling traverse: 30 ~ 50mm.
(8) main acupuncture: main acupuncture bestock: 4000 ~ 6000 pins/rice, main punch frequency 700 ~ 2000 beats/min, main acupuncture traverse: 20 ~ 40mm.
(9) cut winding: winding speed: 2 ~ 20m/min, finally obtain polypropylene spunbond needle-punched geotextiles.
The present invention compared with prior art tool has the following advantages:
1, eliminate spinning post processing boundling stretch, curling, dry, sizing, cut off, pack and open bag, mixing, combing and become each procedures such as net, substantially reduce production process, production cost is lower, and production efficiency is higher.
2, better, the thermal contraction of higher, the uniformity of product brute force and indices more stable, be that polypropylene chopped fiber geotextiles etc. can not be compared.
Accompanying drawing explanation
Fig. 1 is process flow diagram of the present invention.
Detailed description of the invention
Embodiment 1:
Polypropylene fibre feedstock transportation is entered screw extruder melt extrude, screw extruder big L/D ratio and draw ratio are the polypropylene fibre screw extruder of 29:1, its each district temperature: 165 DEG C, 200 DEG C, 230 DEG C, 250 DEG C, 250 DEG C, 260 DEG C, 265 DEG C, 265 DEG C.Melt pressure after filter is 11Mpa, then enters spinning manifold, and through metering from spinnerets ejection, component pressure: 15Mpa, spinning temperature: 265 DEG C, filament number controls at 6dpf, and strength of filament is greater than 4.2CN/dtex.The filament be spun into is cooled by lateral blowing, lateral blowing wind speed: 0.7m/s, lateral blowing temperature: 17 DEG C, lateral blowing humidity: more than 70%.Cooled filament carries out air drawing by pipe type air flow drawing device, and air drawing speed is 5000m/min.Drawing-off pressure is 0.60 Mpa.Pendulum wire after sub-wire, the frequency 900n/min of pendulum wire device, pendulum wire device amplitude of oscillation 45mm.Then on lapping machine, form fiber web, lapping speed: 8m/min, inhale net wind speed and be greater than 8m/s, pony press temperature 90 DEG C.Export fiber web to needing machine, carry out pre-needling, bestock: 5000 pins/rice, pre-needling frequency 960 beats/min, pre-needling traverse: 40mm.Then main acupuncture consolidation, bestock: 5000 pins/rice, main punch frequency 1100 beats/min, main acupuncture traverse: 30mm.Trimming, then reel after cutting into fabric width 7.0 meters, winding speed: 7.8m/min, finally obtains grammes per square metre 120g/m
2polypropylene spunbond needle-punched geotextiles.
Embodiment 2:
PP feedstock transportation is entered screw extruder melt extrude, screw extruder big L/D ratio and draw ratio are the polypropylene fibre screw extruder of 30:1, its each district temperature: 165 DEG C, 200 DEG C, 240 DEG C, 255 DEG C, 255 DEG C, 260 DEG C, 270 DEG C, 270 DEG C.Melt pressure after filter is 12Mpa, then enters spinning manifold, and through metering from spinnerets ejection, component pressure: 16Mpa, spinning temperature: 270 DEG C, filament number controls at 8dpf, and strength of filament is greater than 4.2CN/dtex.The filament be spun into is cooled by lateral blowing, lateral blowing wind speed: 0.9m/s, lateral blowing temperature: 16 DEG C, lateral blowing humidity: more than 70%.Cooled filament carries out air drawing by pipe type air flow drawing device, and air drawing speed is 4600m/min.Drawing-off pressure is 0.65 Mpa.Pendulum wire after sub-wire, the frequency 850n/min of pendulum wire device, pendulum wire device amplitude of oscillation 50mm.Then on lapping machine, form fiber web, lapping speed: 6m/min, inhale net wind speed and be greater than 8m/s, pony press temperature 100 DEG C.Export fiber web to needing machine, carry out pre-needling, bestock: 4000 pins/rice, pre-needling frequency 900 beats/min, pre-needling traverse: 40mm.Then main acupuncture consolidation, bestock: 4000 pins/rice, main punch frequency 1000 beats/min, main acupuncture traverse: 30mm.Trimming, then reel after cutting into fabric width 6.6 meters, winding speed: 5.9m/min, finally obtains grammes per square metre 350g/m
2polypropylene spunbond needle-punched geotextiles.
Claims (1)
1. the production method of a polypropylene spunbond needle-punched geotextiles, the polymer adopted is isotactic structure, melt index is greater than 15, it is characterized in that: polypropylene fibre feedstock transportation is entered screw extruder and melt extrudes, the draw ratio of screw extruder is 29:1, its each district temperature: 165 DEG C, 200 DEG C, 230 DEG C, 250 DEG C, 250 DEG C, 260 DEG C, 265 DEG C, 265 DEG C, melt pressure after filter is 11Mpa, then spinning manifold is entered, spray from spinnerets through metering, component pressure: 15Mpa, spinning temperature: 265 DEG C, filament number controls at 6dpf, strength of filament is greater than 4.2CN/dtex, the filament be spun into is cooled by lateral blowing, lateral blowing wind speed: 0.7m/s, lateral blowing temperature: 17 DEG C, lateral blowing humidity: more than 70%, cooled filament carries out air drawing by pipe type air flow drawing device, and air drawing speed is 5000m/min, and drawing-off pressure is 0.60 Mpa, pendulum wire after sub-wire, the frequency 900n/min of pendulum wire device, pendulum wire device amplitude of oscillation 45mm, then forms fiber web on lapping machine, lapping speed: 8m/min, inhales net wind speed and is greater than 8m/s, pony press temperature 90 DEG C, export fiber web to needing machine, carry out pre-needling, bestock: 5000 pins/rice, pre-needling frequency 960 beats/min, pre-needling traverse: 40mm, then main acupuncture consolidation, bestock: 5000 pins/rice, main punch frequency 1100 beats/min, main acupuncture traverse: 30mm, trimming, then reel after cutting into fabric width 7.0 meters, winding speed: 7.8m/min, finally obtains grammes per square metre 120g/m
2polypropylene spunbond needle-punched geotextiles.
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| CN103361882B (en) * | 2013-05-29 | 2016-03-09 | 仪征易力土工合成材料有限公司 | A kind of chopped fiber needle-punched geotextiles production technology |
| CN104775235B (en) * | 2015-03-12 | 2017-08-15 | 绍兴励达无纺布有限公司 | The manufacture method of polypropylene spun-bonded needle-punched geotextiles |
| CN106498627A (en) * | 2016-10-10 | 2017-03-15 | 天鼎丰材料技术有限公司 | The production system of polypropylene spun-bonded needle-punched geotextiles, production method |
| CN107401155A (en) * | 2016-12-06 | 2017-11-28 | 青海富腾生态科技有限公司 | The improved process and base fabric cracking resistance experimental provision of a kind of waterproof anticracking base fabric |
| CN106676757B (en) * | 2017-02-22 | 2019-03-01 | 天鼎丰聚丙烯材料技术有限公司 | A kind of high-strength corrosion-resisting polypropylene filament geotextiles and preparation method thereof |
| CN106868718B (en) * | 2017-02-22 | 2020-02-21 | 天鼎丰聚丙烯材料技术有限公司 | High-strength polypropylene spun-bonded needle-punched geotextile and preparation method thereof |
| CN106906710A (en) * | 2017-03-06 | 2017-06-30 | 东华大学 | A kind of preparation method of pp geo textiles/GSZ composite geotextile material |
| CN106968051A (en) * | 2017-03-06 | 2017-07-21 | 东华大学 | The preparation method of polypropylene geotextile composite drainage network with anti-filter drain function |
| CN107460640B (en) * | 2017-08-04 | 2020-02-18 | 山东恒鹏卫生用品有限公司 | Non-woven fabric and preparation method and application thereof |
| CN107938177A (en) * | 2017-12-27 | 2018-04-20 | 大连华阳新材料科技股份有限公司 | With position iso-fineness polyester filament geotextiles preparation method |
| CN108239822A (en) * | 2018-03-14 | 2018-07-03 | 天津工业大学 | A kind of Lyocell filament nonwovens material and preparation method thereof |
| CN109554827A (en) * | 2018-10-24 | 2019-04-02 | 大连华阳新材料科技股份有限公司 | A kind of online creel reinforcement production method of Spunbond/Needling Nonwovens |
| CN109208172A (en) * | 2018-10-24 | 2019-01-15 | 大连华阳新材料科技股份有限公司 | A kind of online dual-purpose type of spun-bonded non-woven adds the production method of reinforcing material |
| CN111826935A (en) * | 2020-07-25 | 2020-10-27 | 朱姣 | Shaping treatment method for non-woven geotextile |
| CN113564738A (en) * | 2021-08-19 | 2021-10-29 | 泰安现代塑料有限公司 | Spinning drafting device and polypropylene fiber geotextile production line |
| CN114016214B (en) * | 2021-11-04 | 2023-03-21 | 大连华阳新材料科技股份有限公司 | Method for producing filament spun-bonded non-woven fabric |
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Address after: 116047, 199 Bay Road, Lushunkou District, Liaoning, Dalian Patentee after: DALIAN HUAYANG NEW MATERIALS TECHNOLOGY CO., LTD. Address before: 116047, 199 Bay Road, Lushunkou District, Liaoning, Dalian Patentee before: Dalian Huayang Chemical Fiber Technology Co., Ltd. |