CN104975370A - Melt-spun polyvinylidene fluoride filament and production method thereof - Google Patents
Melt-spun polyvinylidene fluoride filament and production method thereof Download PDFInfo
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- CN104975370A CN104975370A CN201510321086.2A CN201510321086A CN104975370A CN 104975370 A CN104975370 A CN 104975370A CN 201510321086 A CN201510321086 A CN 201510321086A CN 104975370 A CN104975370 A CN 104975370A
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Abstract
The invention discloses a melt-spun polyvinylidene fluoride filament. The melt-spun polyvinylidene fluoride filament has the diameter of 0.08-1.8mm, breaking strength greater than 3.8CN/dtex and breaking elongation of 22-32%. A preparation method of the melt-spun polyvinylidene fluoride filament comprises mixing polyester polyvinylidene fluoride resin and an additive, carrying out extrusion by a screw melting extruder, cooling the extruded melt by a water cooling method to obtain primary filaments, and orderly carrying out hot water drawing, hot air drawing and heat setting on the primary filaments to obtain the biodegradable polyesteramide filaments. The biodegradable polyesteramide filament has high strength and high toughness. The production method has simple processes and a low cost and is suitable for related fields of nets for fishery and agriculture.
Description
Technical field
The present invention relates to a kind of polyvinylidene fluoride monofilament, be specifically related to a kind of method of melt-spun polyvinylidene fluoride monofilament and this monofilament of production.
Background technology
Kynoar is a kind of polymer of crystal type, and intensity is high, TENSILE STRENGTH can reach more than 50MPa, good toughness, have good have soft, excellent in cushion effect, abrasion performance, resistance to creep; There is higher heat resistance and cold resistance, can in ~ 62 DEG C ~ 150 DEG C temperature ranges Long-Time Service; There is excellent weatherability, resistance to ozone, ultraviolet resistance, long service life; Kynoar has excellent chemical stability, under room temperature not by acid, alkali, strong oxidizer and halogen corrode, common organic solvents on it also without impact.Kynoar high comprehensive performance is a kind of polymeric material of excellent performance, has been widely used in the every field such as UF membrane and chemical industry, environmental protection, medical treatment.
First polyvinylidene fluoride resin will be dissolved in certain solvent by Kynoar in spinning process prepares spinning solution, and the solvent that the method uses has the pollution of any to environment.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of melt-spun polyvinylidene fluoride monofilament of high-strength and high ductility.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
Melt-spun polyvinylidene fluoride monofilament, its innovative point is: described monofilament contains Kynoar and 0wt% ~ 4wt% additive of 96wt% ~ 98wt%; The diameter of described monofilament is 0.08 ~ 1.8mm.
Further, described additive is nano titanium oxide or nano-calcium carbonate, and described nano titanium oxide or nano-calcium carbonate have the effect of activeness and quietness.
Further, described additive also comprises paraffin, and its quality is 0 ~ 2.5% of monofilament gross mass, and described paraffin can play smooth interaction.
Further, the fracture strength of described monofilament is greater than 3.8CN/dtex, and elongation at break is 22% ~ 32%.
Another object of the present invention is to the production method that a kind of melt-spun polyvinylidene fluoride monofilament is provided, comprise that raw material mixes, melt extrudes, water cooling, hot water stretch, hot blast stretches, HEAT SETTING and coiling technique, be specially:
(1) raw material mixing: by Kynoar heating and melting, then add additive in proportion, mix;
(2) melt extrude: raw material to melt extrude with the extrusion capacity of 32 ~ 95 kgs/hour through screw rod melt extruder and obtains spun filament, and spun filament temperature is 265 ~ 270 DEG C;
(3) water cooling: spun filament is cooled to 32 ~ 50 DEG C through the water of 5 ~ 50 DEG C or the aqueous solution;
(4) hot water stretches: cooled spun filament carries out one stretching in hot bath, and draw ratio is 4.0 ~ 6.0, and hot water temperature is 70 ~ 85 DEG C;
(5) hot blast stretches: draw ratio is 1.2 ~ 1.6 times, and temperature is 120 ~ 170 DEG C;
(6) HEAT SETTING: heat setting temperature is 180 ~ 260 DEG C;
(7) batch: the monofilament after sizing is wound up on bobbin with the speed of 80 ~ 198m/min.
Further, described screw rod melt extruder melt extrudes with the extrusion capacity of 35 ~ 42 kgs/hour and obtains spun filament, and spun filament temperature is 265 ~ 270 DEG C;
Further, described spun filament is cooled to 45 ~ 50 DEG C through the water of 35 ~ 42 DEG C or the aqueous solution.
Further, the draw ratio that described hot water stretches is 4.5 ~ 5.2, and hot water temperature is 70 ~ 85 DEG C; The draw ratio that hot blast stretches is 1.4 ~ 1.5, and temperature is 120 ~ 150 DEG C; Heat setting temperature is 220 ~ 240 DEG C, and coiling speed is 120 ~ 135m/min.
Beneficial effect of the present invention: compared with prior art, polyvinylidene fluoride monofilament flexibility of the present invention is good, and elongation at break is long, reaches 20 ~ 32%, and monofilament has good toughness, not easily bends impaired, and has good impact resistance; In addition, in preparation process, add enhancing, toughness reinforcing nano titanium oxide or nano-calcium carbonate, make the feature of monofilament high-strength and high ductility of the present invention more outstanding; By technique adjustment, polyvinylidene fluoride monofilament diameter of the present invention can to 0.08 ~ 1.8mm, and fracture strength is greater than 3.8CN/dtex.
Detailed description of the invention
Below in conjunction with specific embodiment, explanation is further explained to summary of the invention of the present invention, but and non-limiting protection scope of the present invention.
Embodiment 1
Obtain spun filament with polyvinylidene fluoride resin resin for raw material to melt extrude with the extrusion capacity of 35 kgs/hour through screw rod melt extruder, melt temperature is 260 DEG C; Spun filament through 10 DEG C be water-cooled to 32 DEG C; Cooled spun filament carries out one stretching in hot bath, and draw ratio is 4.0 times, and hot water temperature is 70 DEG C; Then carry out two road hot blasts to stretch, draw ratio is 1.2 times, and temperature is 70 DEG C; Spun filament carries out HEAT SETTING 185 DEG C of conditions after stretching; Be wound up on bobbin with the speed of 90m/min again.
The diameter of the monofilament that the present embodiment obtains is 0.13mm, fracture strength 3.9CN/dtex, and elongation at break is 27.9%.
Embodiment 2
Use 96wt% Kynoar raw material mix with the nano titanium oxide of 4wt%, then to melt extrude with the extrusion capacity of 50 kgs/hour through screw rod melt extruder and obtain spun filament, melt temperature is 260 DEG C; Spun filament is through emulsion but to 40 DEG C of 20 DEG C; Cooled spun filament carries out one stretching in hot bath, and draw ratio is 4.5 times, and hot water temperature is 75 DEG C; Then carry out two road hot blasts to stretch, draw ratio is 1.4 times, temperature 140 DEG C; Spun filament carries out HEAT SETTING 200 DEG C of conditions after stretching; Be wound up on bobbin with the speed of 120m/min again.
The diameter of the monofilament that the present embodiment obtains is 0.15mm, fracture strength 4.2CN/dtex, and elongation at break is 26.9%.
Embodiment 3
Use 96wt% Kynoar raw material mix with the nano-calcium carbonate of 4wt%, drying machine is dried to moisture content≤50ppm, and baking temperature is 150 DEG C; Then to melt extrude with the extrusion capacity of 50 kgs/hour through screw rod melt extruder and obtain spun filament, melt temperature is 270 DEG C; Spun filament through 20 DEG C be water-cooled to 40 DEG C; Cooled spun filament carries out one stretching in hot bath, and draw ratio is 5.0 times, and hot water temperature is 80 DEG C; Then carry out two road hot blasts to stretch, draw ratio is 1.4 times, temperature 140 DEG C; Spun filament carries out HEAT SETTING 210 DEG C of conditions after stretching; Be wound up on bobbin with the speed of 132m/min again.
The diameter of the monofilament that the present embodiment obtains is 0.17mm, fracture strength 4.2CN/dtex, and elongation at break is 26.1%.
Embodiment 4
Use the polyesteramide raw material of 96wt% to mix with the paraffin of 2wt% nano titanium oxide and 3wt%, drying machine is dried to moisture content≤50ppm, and baking temperature is 132 DEG C; Then to melt extrude with the extrusion capacity of 40 kgs/hour through screw rod melt extruder and obtain spun filament, melt temperature is 260 DEG C; Spun filament is cooled to 50 DEG C through the emulsion of 40 DEG C; Cooled spun filament carries out one stretching in hot bath, and draw ratio is 5.2 times, and hot water temperature is 82 DEG C; Then carry out two road hot blasts to stretch, draw ratio is 1.5 times, and temperature is 165 DEG C; Spun filament carries out HEAT SETTING 232 DEG C of conditions after stretching; Be wound up on bobbin with the speed of 150m/min again.
The diameter of the monofilament that the present embodiment obtains is 0.19mm, fracture strength 4.4CN/dtex, and elongation at break is 25.7%.
Embodiment 5
Use the Kynoar raw material of 97wt% to mix with the paraffin of 0.4wt% nano-calcium carbonate and 2.4wt%, drying machine is dried to moisture content≤50ppm, and baking temperature is 175 DEG C; Then to melt extrude with the extrusion capacity of 32 kgs/hour through screw rod melt extruder and obtain spun filament, melt temperature is 270 DEG C; Spun filament through 50 DEG C be water-cooled to 58 DEG C; Cooled spun filament carries out one stretching in hot bath, and draw ratio is 5.8 times, and hot water temperature is 85 DEG C; Then carry out two road hot blasts to stretch, draw ratio is 1.6, and temperature is 178 DEG C; Spun filament carries out HEAT SETTING 250 DEG C of conditions after stretching; Be wound up on bobbin with the speed of 190m/min again.
The diameter of the monofilament that the present embodiment obtains is 0.15mm, fracture strength 4.8CN/dtex, and elongation at break is 24.6%.
Above-described embodiment is only in order to illustrate technical scheme of the present invention; but not design of the present invention and protection domain are limited; those of ordinary skill in the art modifies to technical scheme of the present invention or equivalent replacement; and not departing from aim and the scope of technical scheme, it all should be encompassed in right of the present invention.
Claims (5)
1. melt-spun polyvinylidene fluoride monofilament, is characterized in that: described monofilament contains Kynoar and 0wt% ~ 4wt% additive of 96wt% ~ 98wt%; The diameter of described monofilament is 0.08 ~ 1.8mm;
Described additive is nano titanium oxide or nano-calcium carbonate;
Described additive also comprises paraffin, and its quality is 0 ~ 2.5% of monofilament gross mass.
2. the melt-spun polyvinylidene fluoride monofilament according to claim requirement 1 and production method thereof, it is characterized in that: the fracture strength of described monofilament is greater than 3.8CN/dtex, elongation at break is 22% ~ 32%.
3. the production method of melt-spun polyvinylidene fluoride monofilament, is characterized in that: comprise that raw material mixes, melt extrudes, water cooling, hot water stretch, hot blast stretches, HEAT SETTING and coiling process, is specially:
(1) raw material mixing: by Kynoar at heating and melting, then add additive in proportion, mix;
(2) melt extrude: raw material to melt extrude with the extrusion capacity of 32 ~ 95 kgs/hour through screw rod melt extruder and obtains spun filament, and spun filament temperature is 265 ~ 270 DEG C;
(3) water cooling: spun filament is cooled to 32 ~ 50 DEG C through the water of 5 ~ 50 DEG C or the aqueous solution;
(4) hot water stretches: cooled spun filament carries out one stretching in hot bath, and draw ratio is 4.0 ~ 6.0, and hot water temperature is 70 ~ 85 DEG C, and the described aqueous solution is polyacrylamide amine emulsifier;
(5) hot blast stretches: draw ratio is 1.2 ~ 1.6 times, and temperature is 120 ~ 170 DEG C;
(6) HEAT SETTING: heat setting temperature is 180 ~ 260 DEG C;
(7) batch: the monofilament after sizing is wound up on bobbin with the speed of 80 ~ 198m/min.
4. the production method of melt-spun polyvinylidene fluoride monofilament according to claim 3, it is characterized in that: described screw rod melt extruder melt extrudes with the extrusion capacity of 35 ~ 42 kgs/hour and obtains spun filament, spun filament temperature is 265 ~ 270 DEG C, and described spun filament is cooled to 45 ~ 50 DEG C through the water of 35 ~ 42 DEG C or the aqueous solution.
5. the production method of melt-spun polyvinylidene fluoride monofilament according to claim 4, is characterized in that: the draw ratio that described hot water stretches is 4.5 ~ 5.2, and hot water temperature is 70 ~ 85 DEG C; The draw ratio that hot blast stretches is 1.4 ~ 1.5, and temperature is 120 ~ 150 DEG C; Heat setting temperature is 220 ~ 240 DEG C, and coiling speed is 120 ~ 135m/min.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106637466A (en) * | 2016-12-01 | 2017-05-10 | 南通博泰美术图案设计有限公司 | Melt spinning polyvinylidene fluoride monofilament and production method thereof |
| CN106637468A (en) * | 2016-12-09 | 2017-05-10 | 南通博泰美术图案设计有限公司 | Polyvinyl alcohol monofilament and production method thereof |
| CN106757473A (en) * | 2016-12-12 | 2017-05-31 | 天津工业大学 | A kind of preparation method of permanent magnetism polymer fiber |
| CN109355780A (en) * | 2018-11-06 | 2019-02-19 | 安徽太平洋特种网业有限公司 | A kind of production technology of strong thermal contraction net |
| CN110747529A (en) * | 2019-11-11 | 2020-02-04 | 南通新帝克单丝科技股份有限公司 | Large-diameter PFA monofilament and production method thereof |
| CN112877795A (en) * | 2021-01-13 | 2021-06-01 | 中国水产科学研究院东海水产研究所 | Preparation method of fishing polyvinylidene fluoride monofilament |
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| CN1621139A (en) * | 2004-09-30 | 2005-06-01 | 浙江大学 | Method for preparing for polyvinylidene fluoride hollow fiber microporous film by melt spinning-pull stretching method |
| CN101590374A (en) * | 2008-05-27 | 2009-12-02 | 广州美能材料科技有限公司 | A kind of Kynoar hollow-fibre membrane and preparation method thereof |
| CN103757736A (en) * | 2013-12-31 | 2014-04-30 | 马海燕 | Large-diameter melt-spun polyvinylidene fluoride monofilament and production method thereof |
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2015
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1621139A (en) * | 2004-09-30 | 2005-06-01 | 浙江大学 | Method for preparing for polyvinylidene fluoride hollow fiber microporous film by melt spinning-pull stretching method |
| CN101590374A (en) * | 2008-05-27 | 2009-12-02 | 广州美能材料科技有限公司 | A kind of Kynoar hollow-fibre membrane and preparation method thereof |
| CN103757736A (en) * | 2013-12-31 | 2014-04-30 | 马海燕 | Large-diameter melt-spun polyvinylidene fluoride monofilament and production method thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106637466A (en) * | 2016-12-01 | 2017-05-10 | 南通博泰美术图案设计有限公司 | Melt spinning polyvinylidene fluoride monofilament and production method thereof |
| CN106637468A (en) * | 2016-12-09 | 2017-05-10 | 南通博泰美术图案设计有限公司 | Polyvinyl alcohol monofilament and production method thereof |
| CN106757473A (en) * | 2016-12-12 | 2017-05-31 | 天津工业大学 | A kind of preparation method of permanent magnetism polymer fiber |
| CN109355780A (en) * | 2018-11-06 | 2019-02-19 | 安徽太平洋特种网业有限公司 | A kind of production technology of strong thermal contraction net |
| CN110747529A (en) * | 2019-11-11 | 2020-02-04 | 南通新帝克单丝科技股份有限公司 | Large-diameter PFA monofilament and production method thereof |
| CN112877795A (en) * | 2021-01-13 | 2021-06-01 | 中国水产科学研究院东海水产研究所 | Preparation method of fishing polyvinylidene fluoride monofilament |
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Application publication date: 20151014 |