CN100347353C - Method for producing polypropylene fiber - Google Patents
Method for producing polypropylene fiber Download PDFInfo
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- CN100347353C CN100347353C CNB2006100257764A CN200610025776A CN100347353C CN 100347353 C CN100347353 C CN 100347353C CN B2006100257764 A CNB2006100257764 A CN B2006100257764A CN 200610025776 A CN200610025776 A CN 200610025776A CN 100347353 C CN100347353 C CN 100347353C
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Abstract
The present invention relates to a method for producing polypropylene fibers, which is characterized in that the nozzle draw ratio of polypropylene resin is 30 to 50; melt fine flow is forced to be cooled and solidified by cross air blasting under low temperature, wherein the temperature of the cross air blasting is 14 to 18 DEG C, and the air quantity is 0.4 to 0.8 meter per second; the wire after cooling and solidification is drawn and shaped by a heat roller, wherein the drawing multiple is 4 to 10; and the shaped fibers are coiled and molded by a high-speed winding machine, wherein the coiling speed is 2000 to 2500 m/min. The equipment investment of the polypropylene fibers produced by the method is 10 to 20% of the existing equipment, the titer is 600 to 2000 tax, and the breaking tenacity can reach more than 7 cN/tax. The polypropylene fibers are suitable for manufacturing bag cloth, backpack bands, ropes, fishing lines, filter cloth, etc.
Description
Technical field
The present invention relates to method for producing polypropylene fiber.
Background technology
Along with the raising and the fast development of social economy of people's living standard, the Application Areas of polypropylene fibre transforms with the aspect to industry from civilian successively.Industry generally has higher-strength with polypropylene fibre, and ((600～2000dtex) products were mainly used in and made case and bag cloth, backpack strip, rope, fishing lines, filter cloth etc. the thick dawn in 6～8cN/dtex).Yet the normal polypropylene long filament of the 75dtex～170dtex that produces on conventional equipment, fracture strength 3.4～4.2cN/dtex can not satisfy these type of needs, produce high-intensity in thick denier polypropylene fibers must adopt special equipment and technology.
To this, the equipment of Britain ESL company and China Textile Academy Machinery Plant all adopts two-step process, and the fracture strength of product is higher (generally at 6cN/dtex～8cN/dtex), to be applicable to the suspender belt of making high strength sewing threads, case and bag band, sports goods etc.The equipment of Italy FARE company is horizontal one-step method production line, its products characteristics is that intensity is moderate (generally at 5cN/dtex～7cN/dtex), three irregularities are low, and raw material and energy resource consumption are low, are fit to do the raw material of industrial cloth, sewing thread, rotary hose, case and bag band, safe guipure.
Above-mentioned preparation method, equipment investment is big, and is difficult in maintenance, and the production cost height is unfavorable for applying.
Summary of the invention
The technical problem that the present invention is permitted to solve is to disclose a kind of method for producing polypropylene fiber, to overcome the above-mentioned defective that prior art exists.
Technical conceive of the present invention is such:
Melt-spinning technology is adopted in the polypropylene fibre moulding, and the performance of fiber depends primarily on the big molecular aggregates attitude structure that forms in the spinning engineering.The aggregated structure of fiber is combined factors decisions such as spinning temperature, jet stretch ratio, lateral blowing temperature, drafting multiple, drawing temperature, winding speed.To fibrous mechanical property have the greatest impact be the orientation and crystalline texture.
Prepare high-intensity fiber, must make fiber have high-orientation.Result of study shows: with the increase of draw ratio, the degree of orientation of macromolecular chain increases in the fiber, and the fracture strength of fiber also improves thereupon.But to polypropylene fibre, be difficult to realize high drafting on the engineering, because isotactic polypropylene is very easily crystallization, crystallization degree height not only, and under the condition of sufficient crystallising, can develop into and stablize perfect α crystal structure.This structure counter extensioin resistance is big, when drafting tension greatly when having surpassed the ultimate strength of fiber, then be difficult to finish high drafting.Therefore, the condition that realize high drafting is to reduce drafting resistance, and promptly making what form in the fiber by technology controlling and process is unsettled para crystalline structure, rather than the α crystal structure.
Therefore, the inventor thinks, in the spinning moulding process, how to make that to form para crystalline structure as far as possible in the PP fiber (precursor) before drawing-off be the key of obtaining high strength PP fiber.
Thick dawn PP fiber in the spinning, the melt thread diameter of extruding is big, and under identical cooling condition, melt thread cooldown rate is slow, and promptly long in the crystallizable temperature range time of staying, this situation is unfavorable for forming para crystalline structure, and forms the α crystal structure easily.
Therefore, the inventor thinks, realizes strengthening cooling, just becomes the key issue of control PP precursor structure.
Therefore, method of the present invention comprises the steps:
Acrylic resin is melt extruded by screw extruder,, become the melt thread, obtain polypropylene fibre through cooling curing, stretching and HEAT SETTING respectively then by spinneret orifice.
It is characterized in that:
(1) jet stretch ratio of acrylic resin is 30～50, and jet stretch ratio is the linear velocity of first roller and the ratio of melt extruded velocity, 5～20 meters/minute of the linear velocities that the melt thread flows out from shower nozzle;
(2) the melt thread is forced cooling curing by the low temperature side blowing, and the temperature of lateral blowing is 14～18 ℃, and air quantity is 1440～2880 cubic metres/hour. square metre;
(3) tow behind the cooling curing, by hot-rolling drawing-off and typing, the temperature of each hot-rolling is:
First pair roller: 85～90 ℃, second pair roller: 100～110 ℃, 115～120 ℃ of the 3rd pair rollers, 125～135 ℃ of the 4th pair rollers, 135～140 ℃ of the 5th pair rollers, drafting multiple are 4～10.
(4) fiber after the typing is through the high-speed winder coiling and molding, and winding speed is 2000～2500 meters/minute.
Adopt the polypropylene fibre of method preparation of the present invention, equipment investment is little, it only is 10～20% of existing equipment, the polypropylene fibre that is obtained, fiber number is 600～2000dtex, fracture strength can reach more than the 7cN/dtex, is applicable to make case and bag cloth, backpack strip, rope, fishing lines, filter cloth etc.
Description of drawings
Fig. 1 is a flow chart of the present invention.
The specific embodiment
Embodiment 1
Adopt flow process shown in Figure 1, with melt index is that the 10g/10min acrylic resin is extruded by screw extruder 1, by spinnerets shower nozzle 2, become the melt thread, behind cooling quench assembly 3 cooling curings, (a-e) is stretched and HEAT SETTING in drawing roller 4, after coiler device 5 coiling and moldings obtain polypropylene fibre;
(1) jet stretch ratio of acrylic resin is 50,5.6 meters/minute of the linear velocities that the melt thread flows out from shower nozzle;
(2) after the melt thread flowed out from shower nozzle, by the crosswind cooling curing that blower fan 4 blows out, the temperature of lateral blowing was 18 ℃, and air quantity is 2160 cubic metres/hour. square metre;
(3) the but product behind the cooling curing, by the drawing roller drawing and setting, the temperature of drawing roller is: first roller: 90 ℃, second pair roller: 110 ℃, 120 ℃ of the 3rd pair rollers, 135 ℃ of the 4th pair rollers, 140 ℃ of the 5th pair rollers, drafting multiple are 7.5
Screw rod is respectively distinguished temperature:
210 ℃ in one district (feed zone), 230 ℃ in two districts, 240 ℃ in three districts, 245 ℃ in four districts, 240 ℃ in five districts, 235 ℃ of melt pipes, 240 ℃ of spinning bodys.
Adopt the polypropylene fibre of above-mentioned method preparation, fiber number is 1420dtex, adopts the method for GB/T14344-2003 standard code to detect, and the fracture strength of product reaches 8.03cN/dtex.
Adopt flow process shown in Figure 1, with melt index is that the 10g/10min acrylic resin is extruded by screw extruder 1, by spinnerets shower nozzle 2, become the melt thread, behind cooling quench assembly 3 cooling curings, (a-e) is stretched and HEAT SETTING in drawing roller 4, after coiler device 5 coiling and moldings obtain polypropylene fibre;
(1) jet stretch ratio of acrylic resin is 30, and the linear velocity that the melt thread flows out from shower nozzle is 20 meters/minute;
(2) after the melt thread flowed out from shower nozzle, by the crosswind cooling curing that blower fan 4 blows out, the temperature of lateral blowing was 14 ℃, 2880 cubic metres/hour of air quantity. square metre;
(3) the but product behind the cooling curing, by the drawing roller drawing and setting, the temperature of drawing roller is:
First pair roller: 85 ℃, second pair roller: 100 ℃, 115 ℃ of the 3rd pair rollers, 125 ℃ of the 4th pair rollers, 135 ℃ of the 5th pair rollers, drafting multiple are 4;
Screw rod is respectively distinguished temperature:
200 ℃ in one district (feed zone), 220 ℃ in two districts, 240 ℃ in three districts, 235 ℃ in four districts, 230 ℃ in five districts, 235 ℃ of melt pipes, 230 ℃ of spinning bodys.
Adopt the polypropylene fibre of above-mentioned method preparation, fiber number is 2000dtex, adopts the method for GB/T14344-2003 standard code to detect, and the fracture strength of product reaches 7.0cN/dtex.
Method by embodiment 1 is carried out spinning, and different is, 5 meters/minute of the linear velocities that the melt thread flows out from shower nozzle, the temperature of lateral blowing are 14 ℃, and air quantity is 1440 cubic metres/hour. square metre, drafting multiple is 10.Adopt the polypropylene fibre of above-mentioned method preparation, fiber number is 900dtex, adopts the method for GB/T14344-2003 standard code to detect, and the fracture strength of product reaches 8.59cN/dtex.
Claims (3)
1. a method for producing polypropylene fiber comprises the steps:
Acrylic resin is melt extruded by screw extruder,, become the melt thread, obtain polypropylene fibre through cooling curing, stretching and HEAT SETTING successively then by spinneret orifice; It is characterized in that:
(1) jet stretch ratio of acrylic resin is 30～50;
(2) the melt thread is forced cooling curing by the low temperature side blowing, and the temperature of lateral blowing is 14～18 ℃, 1440～2880 cubic metres/hour. square metre;
(3) tow behind the cooling curing, by hot-rolling drawing-off and typing, the temperature of each hot-rolling is:
First roller: 85～90 ℃, second pair roller: 100～110 ℃, 115～120 ℃ of the 3rd pair rollers, 125～135 ℃ of the 4th pair rollers, 135～140 ℃ of the 5th pair rollers, drafting multiple are 4～10.
(4) fiber after the typing is through the high-speed winder coiling and molding, and winding speed is 2000～2500m/min.
2. method according to claim 1 is characterized in that the melt index of the acrylic resin that is adopted is 3～10g/10min.
3. method according to claim 1 and 2 is characterized in that, screw rod is respectively distinguished temperature and is: 200～210 ℃ in a district, 220～230 ℃ in two districts, 230～240 ℃ in three districts, 235～245 ℃ in four districts, 230～240 ℃ in five districts, 230～235 ℃ of melt distributing pipes, 230～240 ℃ of spinning manifolds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100257764A CN100347353C (en) | 2006-04-17 | 2006-04-17 | Method for producing polypropylene fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100257764A CN100347353C (en) | 2006-04-17 | 2006-04-17 | Method for producing polypropylene fiber |
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| CN1831217A CN1831217A (en) | 2006-09-13 |
| CN100347353C true CN100347353C (en) | 2007-11-07 |
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| CNB2006100257764A Expired - Fee Related CN100347353C (en) | 2006-04-17 | 2006-04-17 | Method for producing polypropylene fiber |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN101929086B (en) * | 2010-07-19 | 2012-12-12 | 宜兴市恒龙塑料制品有限公司 | Production method of PP (Polypropylene) winding rope for submarine cable |
| CN102839442B (en) * | 2012-09-25 | 2014-08-06 | 广东蒙泰纺织纤维有限公司 | High-strength low-shrinkage polypropylene filament yarn and production method thereof |
| 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 |
| CN105483845B (en) * | 2015-12-04 | 2018-05-08 | 浙江古纤道新材料股份有限公司 | A kind of process equipment of fine-denier sewing thread polyester industrial yarn |
| CN108866652A (en) * | 2018-08-24 | 2018-11-23 | 湖北博韬合纤有限公司 | A kind of processing method of thick denier polypropylene short fiber |
| CN109351209A (en) * | 2018-12-20 | 2019-02-19 | 天津工业大学 | A kind of the film formula and preparation method of perfluoroethylene-propylene hollow-fibre membrane |
| CN113089111B (en) * | 2021-04-02 | 2022-07-15 | 济宁市纤维质量监测中心 | Efficient processing method and device for textile spinning |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1048045C (en) * | 1995-10-12 | 2000-01-05 | 中国石油化工总公司 | Method for producing polypropylene strength fibre |
| CN1310250A (en) * | 2001-03-14 | 2001-08-29 | 中原石油勘探局舒普凡化纤厂 | Production process of far infrared fine-denier polypropylene filament |
| US20040096653A1 (en) * | 2002-11-17 | 2004-05-20 | Cowan Martin E. | High speed spinning procedures for the manufacture of high denier polypropylene fibers and yarns |
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2006
- 2006-04-17 CN CNB2006100257764A patent/CN100347353C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1048045C (en) * | 1995-10-12 | 2000-01-05 | 中国石油化工总公司 | Method for producing polypropylene strength fibre |
| CN1310250A (en) * | 2001-03-14 | 2001-08-29 | 中原石油勘探局舒普凡化纤厂 | Production process of far infrared fine-denier polypropylene filament |
| US20040096653A1 (en) * | 2002-11-17 | 2004-05-20 | Cowan Martin E. | High speed spinning procedures for the manufacture of high denier polypropylene fibers and yarns |
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| C14 | Grant of patent or utility model | ||
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Assignee: Jieyang Guangdong Chemical Fibre Co., Ltd. Assignor: Donghua University|Jiangxi Donghua Machinery Co.,Ltd. Contract fulfillment period: 2008.5.10 to 2018.5.10 contract change Contract record no.: 2009440001040 Denomination of invention: High-strength and high-modulus polypropylene fiber production method Granted publication date: 20071107 License type: Exclusive license Record date: 2009.8.4 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.5.10 TO 2018.5.10; CHANGE OF CONTRACT Name of requester: JIEYANG YUEHAI CHEMICAL FIBRE CO., LTD. Effective date: 20090804 |
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Granted publication date: 20071107 Termination date: 20120417 |