CN1048045C - Method for producing polypropylene strength fibre - Google Patents
Method for producing polypropylene strength fibre Download PDFInfo
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- CN1048045C CN1048045C CN95117005A CN95117005A CN1048045C CN 1048045 C CN1048045 C CN 1048045C CN 95117005 A CN95117005 A CN 95117005A CN 95117005 A CN95117005 A CN 95117005A CN 1048045 C CN1048045 C CN 1048045C
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- 239000004743 Polypropylene Substances 0.000 title claims abstract description 41
- -1 polypropylene Polymers 0.000 title claims abstract description 41
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 41
- 239000000835 fiber Substances 0.000 title claims abstract description 37
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 238000002074 melt spinning Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 30
- 238000009987 spinning Methods 0.000 claims description 16
- 239000002994 raw material Substances 0.000 claims description 11
- 241001589086 Bellapiscis medius Species 0.000 claims description 8
- 239000000155 melt Substances 0.000 claims description 5
- 238000004804 winding Methods 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 238000007664 blowing Methods 0.000 claims 1
- 230000001050 lubricating effect Effects 0.000 claims 1
- 238000000048 melt cooling Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 abstract 1
- 239000002243 precursor Substances 0.000 description 12
- 238000005098 hot rolling Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 11
- 241000209094 Oryza Species 0.000 description 6
- 235000007164 Oryza sativa Nutrition 0.000 description 6
- 235000009566 rice Nutrition 0.000 description 6
- 239000004925 Acrylic resin Substances 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 208000011580 syndromic disease Diseases 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000011067 equilibration Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000007115 recruitment Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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- Artificial Filaments (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
本发明涉及一种丙轮强力丝的制造方法，它采用在熔融纺丝机和锭子式牵伸加捻机上控制纤维分子量在12万-14万范围内的挤出熔体，经螺杆长径比为28的螺杆挤压机挤出，再经喷头组件，冷却风窗的作用以300-600米/分的速度卷绕，平衡12-48小时；再进入锭子式牵伸加捻机上进行二级牵伸，Ⅰ区牵伸比为5.5-6.744875，Ⅱ区牵伸比为1.247-1.25，牵伸速度为150-300米/分，制得无定形取向度fa为0.7以上的牵伸丝，强度为8-9.7g/d的高强丙纶。
The invention relates to a manufacturing method of acrylic high-strength yarn, which adopts the extruded melt with controlled fiber molecular weight in the range of 120,000-140,000 on a melt spinning machine and a spindle type drawing and twisting machine. It is extruded by a 28-inch screw extruder, and then passed through the nozzle assembly, and the effect of the cooling window is wound at a speed of 300-600 m/min, and balanced for 12-48 hours; then enters the spindle-type drawing and twisting machine for secondary Drafting, the drafting ratio of Zone I is 5.5-6.744875, the drafting ratio of Zone II is 1.247-1.25, and the drafting speed is 150-300 m/min. The drawn yarn with the degree of amorphous orientation fa of 0.7 or more is obtained, and the strength is 8-9.7g/d high-strength polypropylene.
Description
The present invention relates to the manufacture method of polypropylene strength fibre, refer to a kind of fiber number especially, the manufacture method of the high-strength polypropylene multifilament of intensity 〉=7.06CN/dtex at 333-1667dtex.
The present process route of producing polypropylene strength fibre is in the world distinguished from the linking of spinning and drafting process one-step method and two-step method, has distinguished vertical and horizontal from the drawing-off mode.The advantage of one-step method is to save intermediate equipment, and floor space is little, and recruitment economizes, and energy consumption is low, and shortcoming is that product silk intensity is low, and intensity can't reach 8g/d, in fact has only 6g/d.
According to International Classification, polypropylene filament intensity 3-6g/d is a normal polypropylene, 6-8g/d be in strong polypropylene fibre, 8g/d is above to be high-strength polypropylene fibre.
The horizontal drawing-off of external employing is a short fiber formula drawing-off mode behind the horizontal boundling, walks many Silk Roads on seven rollers, monofilament is separately reeled after the drawing-off again, goes up twisting mill behind the coiling again and twists.This method is except that the length of pair roller, dynamic balancing etc. have higher requirements, on the whole raw material, equipment (the speed control of rotating part and the precision control of temperature aspect etc.) and the electrical power stabilization aspect of electrical network all there is higher requirement, production management requires harsh, brings certain difficulty for workman's operation and stabilisation production.
Produce the main economic and technical indices comparison sheet of high tenacity pp filament referring to various countries:
| Manufacturer (in not) | Barmay (Germany) | Neunay (Germany) | ESL (Britain) | FARE (Italy) | FILTECO (Italy) | Spin institute of section (China) |
| Process route | One-step method | One-step method | Two step method | One-step method | One-step method | Two step method |
| Equipment investment | Ten thousand dollars of 170-200 | Ten thousand dollars of 170-220 | Ten thousand dollars of 110-140 | Ten thousand dollars of 170-200 | 400-500 ten thousand RMB | |
| Production capacity ton/year | 1000 | 1500 | 750 | 1000 | 1500 | 1500 |
| The drawing-off mode | Horizontal | Vertical | Horizontal | Horizontal | Vertical | Vertical |
| Powerful guarantee value (g/d) | ＞7.5 | ＞7.9 reality 6.0 | ＞8 | ＞7.5 reality 6.0 | ＞7.5 reality 6.0 | ＞8 |
| Percentage elongation % | 20-25 | 15-22 | 16-25 | ＜40 | 15-25 |
What China adopted is the vertical drawing-off of two step method, and drawing-off is twisted simultaneously, and the monofilament broken end does not influence other the Silk Road, is to be suitable for the drafting method that long filament is produced.
The applicant provides a kind of " manufacture method of polypropylene strength fibre " at first to file CN91101819.0, what specifically adopt is the acrylic resin of using melt flow index MF1=5-40 and molecular weight distributing index MWD＜7, with 400-1600 rice/minute the spin imitative silk of a speed moulding, carry out the two-stage draw twisting then on spindle formula draw twister, making the multifilament fiber number is the high-strength polypropylene filament of 400-1600 dtex.Its major defect is:
1, because the control of the temperature of each district of screw rod, conveyance conduit and spinning manifold is incomplete same, often make the molecular weight of melt produce fluctuation, the uniformity of its melt is relatively poor, causes the quality instability.
2,, be easy to generate broken end or lousiness in the drawing-off processing because equilibration time is shorter, and below 12 hours, the internal stress of precursor is bigger.
3, be below 4.3 owing to the draw ratio in I district is less, more greatly more than 1.6, II district drawing temperature hangs down below 140 ℃ the draw ratio in II district, causes macromolecular orientation and heat resistance relatively poor, influences the raising of finished silk brute force.
The objective of the invention is to overcome the drawback of prior art, provide a kind of fiber number, the production method of the high-strength polypropylene multifilament that intensity 〉=7.06CN/dtex (8g/d) is above at 333-1667dtex.
The present invention also aims to adopt the controlling fiber molecular weight and the amorphous region degree of orientation on melt spinning machine and spindle formula draw twister, produce high-strength polypropylene filament, overcome prior art and make complex process, the equipment defective how that the production process route of polypropylene strength fibre adopts the spinning of multistage drafting technology low speed, water-bath cooling, the traction of the hot case short fiber of seven rollers formula etc.
The present invention also aims to save equipment investment, improve the quality of products and reduce cost, the drafted fibre price that makes precursor is reduced to about 1,500 dollars by the 5000 dollars per ton of U.S., makes it production domesticization.The object of the present invention is achieved like this: a kind of manufacture method of polypropylene strength fibre comprises: with the polypropylene resin is raw material spinning control molecular weight and para-crystal content on melt spinning machine; Carry out the fusion cooling, lubricate and strain described long filament, after oiling, oiling roller is wound into precursor, precursor enters the controlling fiber amorphous region degree of orientation on the spindle formula draw twister through balance, collude and feed roller through seal wire and be wound to first hot-rolling, this long filament further is stretched from first hot-rolling to the second hot-rolling by the back that partly stretches, be wound to the 3rd deflector roll from second hot-rolling through stereotype plate, after the 3rd deflector roll twined a few, tow was wound into described long filament through spindle formula coiling twisting apparatus; It is characterized in that: the heating-up temperature of respectively distinguishing of the screw extruder that adopts on melt spinning machine is 220 ℃-280 ℃; Progradation is pushed in the rotation that raw material is subjected to heating with screw rod on screw extruder, obtains the melt extrusion of molecular weight in 120,000-140,000 scopes, and extrudes from screw tip; Be assigned to each melt arm through the melt house steward, enter nozzle component through measuring pump again, in nozzle component, extrude from the porous spinnerets through distribution plate with after filtering, then under the effect of cooling fan with lower spinning silk winding speed 300-600 rice/minute coiling solidified forming; Then with gained precursor balance 12-48 hour, enter again on the spindle formula twisting mill and carry out the secondary drawing-off, first order drawing temperature is controlled at 75-85 ℃, I district draw ratio is 5.5-6.744875, second level drawing temperature is controlled at 145-155 ℃, and II district draw ratio is 1.247-1.25, draft speed be 150-300 rice/minute, make amorphous region degree of obtaining fa and be the drafted fibre more than 0.7, intensity is the polypropylene strength fibre of 8-9.7g/d.
Followingly in this spinning technique must satisfy simultaneously: screw slenderness ratio L/D=28, the melt index of raw material section is MI=15-25, screw tip pressure is 5-10Mpa; The aperture of spinnerets is 0.35, hole draw ratio L/D=4; Cooling quench=1.84 meter, cooling wind-warm syndrome are below 15 ℃, and the cooling wind speed is the 0.3-0.55 meter per second, spinning silk winding speed be 300-600 rice/minute; I district draw ratio is 0.080119; I district draw ratio is 6.232122; The ratio of II district drawing-off is 1.247055; Carry out the secondary drawing-off on spindle formula twisting mill, first order drawing temperature is controlled at 77 ℃ or 80 ℃; Carry out the secondary drawing-off on spindle formula twisting mill, second level drawing temperature is controlled at 148 ℃ or 152 ℃; This draft speed is 177.34 meters/minute; In five thermals treatment zone, district's temperature is 220 ℃ on the above-mentioned screw extruder, and the temperature from second district to spinning manifold B all is set at 265 ℃; Through the precursor balance of melt spinning machine winding 24 hours.
The invention has the advantages that:
1, abandoned the notion of pursuing high molecular in the past simply and preparing high-strength polypropylene fibre with low degree of draft, take all factors into consideration high molecular itself and help the fiber strength raising, be unfavorable for improving the drafting rate and the fiber amorphous region degree of orientation but then, thereby be unfavorable for boosting productivity and the mutual restriction factor of fibre strength, control the later molecular weight of raw material section process screw extruder and the thermal degradation of casing distribution duct in 120,000-140,000 scopes, broken through research forbidden zone in the past.
2, under the moderate prerequisite of molecular weight, the coupling of a whole set of spinning technology parameter makes even structure, para-crystal content height, is suitable at a high speed and the production of the polypropylene fibre silk of high magnification drawing-off becomes possibility.
3, possess under the prerequisite of high drawing-off performance at precursor, the coupling of a whole set of draft process parameter makes precursor possess on the spindle formula draw twister of two-stage drawing-off function, 150-300 rice/minute speed under drawing-off more than 7 times, obtain the above high-strength polypropylene fibre of intensity 8-9.7g/d.
4, organization development satisfy the process software requirement, be fit to the polypropylene strength fibre special complete equipment of China's national situation and device fabrication ability, replace external import polypropylene strength fibre special equipment.
5, save equipment investment, improved product quality, reduced cost, realized the production domesticization of polypropylene strength fibre.
Concrete structure of the present invention further specifies by following examples and accompanying drawing thereof.
Fig. 1, for melt spinning machine process flow diagram of the present invention.
Fig. 2, for spindle formula draw twister process flow diagram of the present invention.
Referring to Fig. 1-2, for melt spinning machine of the present invention and the technological process of spindle formula draw twister as follows:
(1) spinning technique
On melt spinning machine, with melt index M1-18, divided amount M=145518, the acrylic resin of molecular weight distributing index MWD=3.79 is the raw material spinning, raw material section 2 enters the screw extruder 3 with big screw slenderness ratio L/D=28 from hopper 1; Screw extruder 3 is provided with 5 thermal jackets and divides 5 thermals treatment zone; The rotation extruding progradation that raw material section 2 is subjected to heating with screw rod in screw extruder 3 becomes melt.Screw rod I district temperature is set at 220 ℃, temperature from the II district to spinning manifold B all is set at 265 ℃, and control screw tip pressure is 5Mpa, and melt is extruded from screw tip, be assigned to 6 melt arms 5 through melt house steward 4, enter nozzle component 7 through measuring pump 6 again; In nozzle component 7 through distribution plate and after filtering from the aperture 0.35,120 in hole, hole draw ratio I/D is that 4 spinnerets 8 is extruded, be 1.84 meters quenching air window cooling curing shaping then in cooling length, the cooling wind-warm syndrome is 12 ℃, wind speed is 0.34 meter per second, the nothing oil silk molecular weight that records is M=121060, after oiling, the twice oiling roller becomes precursor 11 then with 350 meters/component velocity coiling, the overall crystallinity that records precursor 11 is 51.69%, β degree of crystallinity 40.02%, then with precursor 11 25 ℃ of following balances 48 hours, so that reduce the stress that includes, be convenient to obtain higher orientation.
(2) draft process: precursor 11 entered after the balance on the spindle formula draw twister through 48 hours and carries out drawing-off, at first through seal wire collude 18 and the feeding roller 12 be wound to first hot-rolling 13; The temperature of first hot-rolling 13 is 75 ℃, twines to second hot-rolling 14 after twining a few again, and its temperature is 145 ℃, is I district draw ratio more than 5.5 times in the velocity ratio of second hot-rolling 14 and first hot-rolling 13, can be at 6.080119 times; After twining a few on second hot-rolling 14, tow is wound to the 3rd deflector roll 16 through stereotype plate 5, the velocity ratio of the 3rd deflector roll 16 and second hot-rolling 14 is II district draw ratio, below 1.25 times, can be 1.247 times, draft speed be 150-300 rice/minute, be preferably 177.34 meters/minute, total stretch ratio is more than 7 times; Tow twines a few backs on the 3rd deflector roll 16 reels with 5000r.p.m spindle speed, becomes drafted fibre 17.Promptly obtain 333dtex/120f, the degree of orientation fa of draw twisting multifilament is 0.8631, and fracture strength is 8.56CN/dtex (9.7g/d), fracture strength irregularity CV%=1.53%, elongation at break %=17.0%, the qualified polypropylene strength fibre product of extension at break irregularity CV%=2.79%.
Other condition is with embodiment 1, control screw tip pressure is 6MPa, melt is extruded through the spinnerets in 2 * 120 holes, measuring pump rotating speed 19.13r.p.m double pump, the cooling wind speed is 0.45 meter/minute, the nothing oil silk molecular weight M=126905 that records, undrawn yarn β degree of crystallinity 46.14%, overall crystallinity 52.78% carries out drawing-off with undrawn yarn 25 ℃ of following balances, 77 ℃ of first heat roller temperatures after 24 hours, I district draw ratio is 6.232122,148 ℃ of second heat roller temperatures, II district draw ratio are that 1.247055 gained polypropylene fibre silks are 1000dtex/240f, and the degree of orientation fa of draw twisting multifilament is 0.8092, fracture strength is 7.87CN/dtex (8.9g/d), fracture strength CV%=1.60%, extension at break (%)=200%, extension at break CV irregularity (%)=4.60%.
Other condition is with embodiment 1, control screw tip pressure is 10Mpa, melt is extruded through the spinnerets in 2 * 120 holes, (measuring pump rotating speed 34.50r.p.m double pump), the cooling wind speed is 0.52 meter/minute, record and do not have oil silk molecular weight M=133494, volume burns silk β degree of crystallinity 46.34%, overall crystallinity 56% carries out drawing-off with undrawn yarn 25 ℃ of following balances, 80 ℃ of first heat roller temperatures after 12 hours, I district draw ratio is 6.744879,152 ℃ of second heat roller temperatures, II district draw ratio is 1.247055, the degree of orientation fa of gained polypropylene fibre multifilament 1667dtex/240f is 0.7459, fracture strength is 7.49CN/dtex (8.5g/d), fracture strength irregularity CV (%)=2.58%, elongation at break 21.8%, extension at break irregularity CV (%)=5.02%.
More than three kinds of embodiment all can make qualified product, satisfied the technical indicator of polypropylene strength fibre, filled up the blank of the high-strength polypropylene strength fibre of domestic production.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95117005A CN1048045C (en) | 1995-10-12 | 1995-10-12 | Method for producing polypropylene strength fibre |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95117005A CN1048045C (en) | 1995-10-12 | 1995-10-12 | Method for producing polypropylene strength fibre |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1128811A CN1128811A (en) | 1996-08-14 |
| CN1048045C true CN1048045C (en) | 2000-01-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95117005A Expired - Lifetime CN1048045C (en) | 1995-10-12 | 1995-10-12 | Method for producing polypropylene strength fibre |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100347353C (en) * | 2006-04-17 | 2007-11-07 | 东华大学 | Method for producing polypropylene fiber |
| CN101650205B (en) * | 2008-08-15 | 2011-05-04 | 陆联精密股份有限公司 | Liquid pump shunt measuring device |
| CN101851798B (en) * | 2009-03-31 | 2011-07-20 | 中国水产科学研究院东海水产研究所 | Method for preparing fishing poly-blended and modified polypropylene monofilaments |
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| CN100357505C (en) * | 2005-06-27 | 2007-12-26 | 江苏泽天化纤有限公司 | High strength and low extending thick Denier polypropylene yarns and production thereof |
| CN101851793B (en) * | 2009-03-31 | 2011-07-20 | 中国水产科学研究院东海水产研究所 | Preparation method of modified polypropylene bristle monofilament for rope of aquaculture net cage or trawl fishing tool |
| CN101982575B (en) * | 2010-11-16 | 2012-07-04 | 张家港锦亿化纤有限公司 | Sea-island polyester drawn yarn and preparation method thereof |
| CN102199806A (en) * | 2011-04-12 | 2011-09-28 | 射阳县恩玉化纤有限公司 | Method for producing high-tenacity polypropylene fibre |
| CN103510270A (en) * | 2013-10-23 | 2014-01-15 | 吴江市万盟纺织有限公司 | Corrosion-resistant polypropylene fiber fabric |
| CN104562282A (en) * | 2014-06-25 | 2015-04-29 | 巢湖市荷花渔网有限公司 | Fishing net thread suitable for being used in seawater |
| CN107709640B (en) * | 2015-07-24 | 2021-07-16 | 三菱化学株式会社 | Polypropylene fiber and method for producing the same |
| CN109295513A (en) * | 2018-12-17 | 2019-02-01 | 广东蒙泰高新纤维股份有限公司 | A kind of method that melt-spun-wet spinning technology prepares super High-strength low-shrinkage polypropylene filament yarn |
-
1995
- 1995-10-12 CN CN95117005A patent/CN1048045C/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100347353C (en) * | 2006-04-17 | 2007-11-07 | 东华大学 | Method for producing polypropylene fiber |
| CN101650205B (en) * | 2008-08-15 | 2011-05-04 | 陆联精密股份有限公司 | Liquid pump shunt measuring device |
| CN101851798B (en) * | 2009-03-31 | 2011-07-20 | 中国水产科学研究院东海水产研究所 | Method for preparing fishing poly-blended and modified polypropylene monofilaments |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1128811A (en) | 1996-08-14 |
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