CN105133064B - A kind of preparation method of PTFE chopped fibers - Google Patents
A kind of preparation method of PTFE chopped fibers Download PDFInfo
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Abstract
The present invention relates to a kind of preparation method of PTFE chopped fibers, its preparation method is as follows：（1）Polyflon raw material is ultrasonically treated；（2）Sintering is made crystallinity blank；（3）Extruding is obtained thread blank in adding to plastic extruder；（4）Add to prepared fiber crin in stretching-machine；（5）Add to prepared filament coarse fodder in the machine of twisting；（6）Repeat step（4）And step（5）1 ~ 2 time, prepared filament is finely expected；（7）Add to prepared long fibre silk in drafting machine；（8）By cutting machine cutting short-forming fiber；（9）To add to carry out in crimping machine and PTFE chopped fiber finished products are obtained；The present invention is made of 100% pure PTFE, with short production cycle, product quality stabilization, and the PTFE chopped fibers high temperature resistant being made, acid and alkali-resistance, corrosion-resistant, chemical stability are extremely strong.
Description
Technical field
The present invention relates to a kind of preparation method of PTFE chopped fibers, belong to plastic optical fibre technology field.
Background technology
Polytetrafluoroethylene (PTFE)（Teflon or PTFE）, " King " is commonly called as, it is by the aggregated macromolecule of tetrafluoroethene
Compound, with excellent chemical stability, corrosion resistance, sealing, high lubrication non-stick, electrical insulating property and good anti-ageing
Change endurance, can be used as engineering plastics；The filling of fiber can effectively improve the strength and stiffness of plastics, reinforced plastics category rigidity knot
Structure material.
Polytetrafluoroethylene fibre production technology of the prior art, due to adding auxiliary agent to improve property during processing and forming
Can, easily cause on finished product containing a large amount of micropores, while reducing material stiffness, in drawing process, transverse breakage is easily caused, produce
Product length, quality differ, the problems such as also polluting, but in the case of without any auxiliary agent, it is ensured that product into
Type quality, flexibility and degree of rigidity are suitable, are the technological difficulties of this area.
The content of the invention
The purpose of the present invention is directed to the defect of prior art, there is provided a kind of preparation method of PTFE chopped fibers, uses
100% pure PTFE is made, with short production cycle, product quality stabilization, the PTFE chopped fibers high temperature resistant that is made, acid and alkali-resistance, it is corrosion-resistant,
Chemical stability is extremely strong.
The present invention is achieved by the following technical solutions.
A kind of preparation method of PTFE chopped fibers, its preparation method is as follows：
（1）By polyflon raw material at 25 ~ 35 DEG C ultrasonically treated 30 ~ 50min；
（2）Will be through step（1）Polyflon raw material after treatment is added in mould, is subsequently placed into sintering furnace,
It is 330 ~ 475 DEG C of 20 ~ 35min of sintering to control temperature, is made the blank that crystallinity is 20% ~ 40%；
（3）Extruding is obtained thread blank during blank is added into plastic extruder, and the operating temperature for controlling plastic extruder is
120 ~ 155 DEG C, head of plastic extruder pressure be 10 ~ 20MPa, rotating speed be 20 ~ 50r/min, the thread blank diameter be 2 ~
3cm；
（4）The thread prepared fiber crin of blank tow elongation, restrained stretching machine are carried out during thread blank is added into stretching-machine
Operating temperature be 165 ~ 210 DEG C, linear velocity be 0.5 ~ 1.2m/min；
（5）The prepared filament coarse fodder of fiber crin tow twisting, control twisting are carried out during fiber crin is added into twisting mill
The operating temperature of machine is 65 ~ 130 DEG C, and linear velocity is 0.8 ~ 1.5m/min；
（6）Repeat step（4）And step（5）1 ~ 2 time, prepared filament is finely expected；
（7）Filament is finely expected add in drafting machine, the single fiber during filament is finely expected draws and attenuates, and long fibre is obtained
Silk, it is 85 ~ 150 DEG C to control the operating temperature of drafting machine, and linear velocity is 1.8 ~ 2.5m/min；
（8）By long fibre silk by cutting machine, by long fibre silk cutting short-forming fiber；
（9）Chopped fiber to add to carry out in crimping machine chopped fiber tow Texturized, PTFE chopped fiber finished products are obtained.
A kind of preparation method of above-mentioned PTFE chopped fibers, wherein, the fiber crin tow twisting process, fiber crin is
2 ~ 5 strands.
A kind of preparation method of above-mentioned PTFE chopped fibers, wherein, the length of the chopped fiber is 40 ~ 120mm.
A kind of preparation method of above-mentioned PTFE chopped fibers, wherein, the drafting machine includes base, and described base one end sets
Have a foot stool, the other end is provided with operating desk, described operating desk is provided with control button, described operating desk one end by welding with
Base achieves a fixed connection, and the other end is provided with casing, and described casing is provided with baffle plate, and described casing side is provided with charging
End, opposite side is provided with collecting drum, tank is provided with described feed end, is provided with dryer at collecting drum, described dryer with
Draw roll is provided between tank, described draw roll is five, is staggered one on the other, and the length R1 of described baffle plate is more than
The length R2 of draw roll, described draw roll includes installation end, drawing-off end and positive stop end, and the width r1 of described installation end is more than
Width r3s of the width r2 at drawing-off end less than positive stop end.
A kind of preparation method of above-mentioned PTFE chopped fibers, wherein, the length of described installation end is L1, and L1 is 3-5cm.
A kind of preparation method of above-mentioned PTFE chopped fibers, wherein, the length at described drawing-off end is L2, and L2 is 10-15cm.
A kind of preparation method of above-mentioned PTFE chopped fibers, wherein, the length of described positive stop end is L3, and L3 is 2-3cm.
Beneficial effects of the present invention are：
The present invention is made of 100% pure PTFE, without any auxiliary agent, is controlled using the temperature in technique, pressure etc.,
Reach superior plasticity, it is to avoid the material stiffness reduction that auxiliary agent is caused, horizontal stroke in drawing process are added in traditional handicraft
To fracture, the problems such as product length, quality differ, pollute；TFE raw material is carried out ultrasonically treated, greatly reduce product
Micropore during life, improves final product quality, while shortening the production cycle；Fiber crin is repeated to enter stretching-machine and twisting
Machine, improves finished product rigidity and tensile strength；Single fiber during drafting machine can be such that filament finely expects draws and attenuates, it is ensured that finished product
Being of close texture property.
To sum up, of the invention with short production cycle, product quality stabilization is the PTFE chopped fibers high temperature resistant that is made, acid and alkali-resistance, resistance to
Burn into chemical stability is extremely strong, can be used for the chemical ring of temperature environment, high humidity environment and the PH0-14 of temperature -210 ~ 265 DEG C
Border, it is non-aging.
Brief description of the drawings
Fig. 1 is drafting machine entirety front view in the present invention.
Fig. 2 is drawing-off side view in the present invention.
Fig. 3 is drafting machine draw roll structure chart in the present invention.
Specific embodiment
Specific embodiment of the invention is described further with reference to embodiment.
Embodiment 1
A kind of preparation method of PTFE chopped fibers, its preparation method is as follows：
（1）By polyflon raw material at 30 DEG C ultrasonically treated 36min；
（2）Will be through step（1）Polyflon raw material after treatment is added in mould, is subsequently placed into sintering furnace,
It is 410 DEG C of sintering 28min to control temperature, is made the blank that crystallinity is 28%；
（3）Extruding is obtained thread blank during blank is added into plastic extruder, and the operating temperature for controlling plastic extruder is
130 DEG C, head of plastic extruder pressure is 15MPa, and rotating speed is 25r/min, and the thread blank diameter is 2.2cm；
（4）The thread prepared fiber crin of blank tow elongation, restrained stretching machine are carried out during thread blank is added into stretching-machine
Operating temperature be 170 DEG C, linear velocity is 0.8m/min；
（5）The prepared filament coarse fodder of fiber crin tow twisting, the fiber are carried out during fiber crin is added into twisting mill
Crin tow twisting process, fiber crin is 2 strands, controls the operating temperature of twisting mill for 112 DEG C, and linear velocity is 1.1m/min；
（6）Repeat step（4）And step（5）2 times, prepared filament is finely expected；
（7）Filament is finely expected add in drafting machine, the single fiber during filament is finely expected draws and attenuates, and long fibre is obtained
Silk, controls the operating temperature of drafting machine for 96 DEG C, and linear velocity is 2.3m/min；
（8）By long fibre silk by cutting machine, by long fibre silk cutting short-forming fiber, the length of the chopped fiber for 40 ~
100mm。
（9）Chopped fiber to add to carry out in crimping machine chopped fiber tow Texturized, PTFE chopped fiber finished products are obtained.
Embodiment 2
A kind of preparation method of PTFE chopped fibers, its preparation method is as follows：
（1）By polyflon raw material at 32 DEG C ultrasonically treated 35min；
（2）Will be through step（1）Polyflon raw material after treatment is added in mould, is subsequently placed into sintering furnace,
It is 365 DEG C of sintering 22min to control temperature, is made the blank that crystallinity is 33%；
（3）Extruding is obtained thread blank during blank is added into plastic extruder, and the operating temperature for controlling plastic extruder is
135 DEG C, head of plastic extruder pressure is 14MPa, and rotating speed is 29r/min, and the thread blank diameter is 2.4cm；
（4）The thread prepared fiber crin of blank tow elongation, restrained stretching machine are carried out during thread blank is added into stretching-machine
Operating temperature be 175 DEG C, linear velocity is 0.6m/min；
（5）The prepared filament coarse fodder of fiber crin tow twisting, the fiber are carried out during fiber crin is added into twisting mill
Crin tow twisting process, fiber crin is 4 strands, controls the operating temperature of twisting mill for 75 DEG C, and linear velocity is 1.2m/min；
（6）Repeat step（4）And step（5）1 time, prepared filament is finely expected；
（7）Filament is finely expected add in drafting machine, the single fiber during filament is finely expected draws and attenuates, and long fibre is obtained
Silk, controls the operating temperature of drafting machine for 125 DEG C, and linear velocity is 2.5m/min；
（8）By long fibre silk by cutting machine, by long fibre silk cutting short-forming fiber, the length of the chopped fiber for 60 ~
110mm。
（9）Chopped fiber to add to carry out in crimping machine chopped fiber tow Texturized, PTFE chopped fiber finished products are obtained.
Embodiment 3
A kind of preparation method of PTFE chopped fibers, its preparation method is as follows：
（1）By polyflon raw material at 26 DEG C ultrasonically treated 50min；
（2）Will be through step（1）Polyflon raw material after treatment is added in mould, is subsequently placed into sintering furnace,
It is 332 DEG C of sintering 35min to control temperature, is made the blank that crystallinity is 39%；
（3）Extruding is obtained thread blank during blank is added into plastic extruder, and the operating temperature for controlling plastic extruder is
135 DEG C, head of plastic extruder pressure is 15MPa, and rotating speed is 30r/min, and the thread blank diameter is 3cm；
（4）The thread prepared fiber crin of blank tow elongation, restrained stretching machine are carried out during thread blank is added into stretching-machine
Operating temperature be 190 DEG C, linear velocity is 0.6m/min；
（5）The prepared filament coarse fodder of fiber crin tow twisting, the fiber are carried out during fiber crin is added into twisting mill
Crin tow twisting process, fiber crin is 3 strands, controls the operating temperature of twisting mill for 115 DEG C, and linear velocity is 1.3m/min；
（6）Repeat step（4）And step（5）2 times, prepared filament is finely expected；
（7）Filament is finely expected add in drafting machine, the single fiber during filament is finely expected draws and attenuates, and long fibre is obtained
Silk, controls the operating temperature of drafting machine for 125 DEG C, and linear velocity is 2.4m/min；
（8）By long fibre silk by cutting machine, by long fibre silk cutting short-forming fiber, the length of the chopped fiber is 90mm.
（9）Chopped fiber to add to carry out in crimping machine chopped fiber tow Texturized, PTFE chopped fiber finished products are obtained.
Drafting machine as described in embodiment 1,2,3, including base 1, described one end of base 1 are provided with foot stool 2, the other end
Operating desk 3 is provided with, described operating desk 3 is provided with control button 4, and described one end of operating desk 3 is realized by welding with base 1
It is fixedly connected, the other end is provided with casing 5, described casing 5 is provided with baffle plate 6, and the described side of casing 5 is provided with feed end 7, separately
Side is provided with collecting drum 8, and tank 9 is provided with described feed end 7, and dryer 10, described dryer 10 are provided with collecting drum 8
It is provided with draw roll 11 between tank 9, described draw roll 11 is five, is staggered one on the other, the length of described baffle plate 6
Degree R1 is more than the length R2 of draw roll 11, and described draw roll 11 includes installation end 12, drawing-off end 13 and positive stop end 14, described
The width r1 of installation end 12 more than drawing-off end 13 width r3s of the width r2 less than positive stop end 14, the length of described installation end 12
It is L1, L1 is 3-5cm, and the length at drawing-off end 13 is L2, and L2 is 10-15cm, and the length of positive stop end 14 is L3, and L3 is 2-3cm.
It is of the invention with short production cycle, product quality stabilization, the PTFE chopped fibers high temperature resistant that is made, acid and alkali-resistance, it is corrosion-resistant,
Chemical stability is extremely strong, can be used for the chemical environment of temperature environment, high humidity environment and the PH0-14 of temperature -210 ~ 265 DEG C, is difficult
It is aging.
The present invention preferably specific embodiment is above are only, but protection scope of the present invention is not limited thereto, it is any
Those familiar with the art the invention discloses technical scope in, the change or replacement that can be readily occurred in, all should
Cover within the scope of the present invention.Therefore, protection scope of the present invention should be defined by the protection domain of claims.
Claims (7)
1. a kind of preparation method of PTFE chopped fibers, it is characterized by, its preparation method is as follows：
（1）By polyflon raw material at 25 ~ 35 DEG C ultrasonically treated 30 ~ 50min；
（2）Will be through step（1）Polyflon raw material after treatment is added in mould, is subsequently placed into sintering furnace, control
Temperature is 330 ~ 475 DEG C of 20 ~ 35min of sintering, is made the blank that crystallinity is 20% ~ 40%；
（3）Blank being added into extruding in plastic extruder thread blank is obtained, the operating temperature for control plastic extruder is 120 ~
155 DEG C, head of plastic extruder pressure is 10 ~ 20MPa, and rotating speed is 20 ~ 50r/min, and the thread blank diameter is 2 ~ 3cm；
（4）The thread prepared fiber crin of blank tow elongation, the work of restrained stretching machine are carried out during thread blank is added into stretching-machine
It is 165 ~ 210 DEG C to make temperature, and linear velocity is 0.5 ~ 1.2m/min；
（5）The prepared filament coarse fodder of fiber crin tow twisting is carried out during fiber crin is added into twisting mill, control twisting mill
Operating temperature is 65 ~ 130 DEG C, and linear velocity is 0.8 ~ 1.5m/min；
（6）Repeat step（4）And step（5）1 ~ 2 time, prepared filament is finely expected；
（7）Filament is finely expected add in drafting machine, the single fiber during filament is finely expected draws and attenuates, long fibre silk is obtained,
It is 85 ~ 150 DEG C to control the operating temperature of drafting machine, and linear velocity is 1.8 ~ 2.5m/min；
（8）By long fibre silk by cutting machine, by long fibre silk cutting short-forming fiber；
（9）Chopped fiber to add to carry out in crimping machine chopped fiber tow Texturized, PTFE chopped fiber finished products are obtained.
2. a kind of preparation method of PTFE chopped fibers as claimed in claim 1, it is characterized by, the fiber crin tow twisting
Process, fiber crin is 2 ~ 5 strands.
3. a kind of preparation method of PTFE chopped fibers as claimed in claim 1, it is characterized by, the length of the chopped fiber is 40
~120mm。
4. a kind of preparation method of PTFE chopped fibers as claimed in claim 1, it is characterized by, the drafting machine includes base,
Described base one end is provided with foot stool, and the other end is provided with operating desk, and described operating desk is provided with control button, described operation
Platform one end is achieved a fixed connection by welding with base, and the other end is provided with casing, and described casing is provided with baffle plate, described case
Body side is provided with feed end, and opposite side is provided with collecting drum, tank is provided with described feed end, and dryer is provided with collecting drum,
Draw roll is provided between described dryer and tank, described draw roll is five, is staggered one on the other, described gear
The length R1 of plate is more than the length R2 of draw roll, and described draw roll includes installation end, drawing-off end and positive stop end, described installation
Width r2 width r3s less than positive stop end of the width r1 at end more than drawing-off end.
5. a kind of preparation method of PTFE chopped fibers as claimed in claim 4, it is characterized by, the length of described installation end is
L1, L1 are 3-5cm.
6. a kind of preparation method of PTFE chopped fibers as claimed in claim 4, it is characterized by, the length at described drawing-off end is
L2, L2 are 10-15cm.
7. a kind of preparation method of PTFE chopped fibers as claimed in claim 4, it is characterized by, the length of described positive stop end is
L3, L3 are 2-3cm.
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| CN108914232A (en) * | 2018-07-17 | 2018-11-30 | 江苏金由新材料有限公司 | A kind of preparation method of PTFE Down Fiber |
| CN111890587A (en) * | 2020-08-11 | 2020-11-06 | 常州万容新材料科技有限公司 | Method for manufacturing PTFE short fiber |
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| CN102560714A (en) * | 2010-12-27 | 2012-07-11 | 山东嘉年华氟纶有限公司 | PTFE (Polytetrafluoroethylene) low-shrinkage crimped chopped fiber for filter needled-punched felt and manufacturing method of PTFE low-shrinkage crimped chopped fiber |
| CN202430355U (en) * | 2011-11-15 | 2012-09-12 | 厦门柏润氟材料科技有限公司 | Microwave sintering drafting device for pasty polytetrafluoroethylene extruded fibers |
| CN104831396A (en) * | 2014-02-10 | 2015-08-12 | 阜新晟氟利高分子材料有限公司 | Processing method for high-strength polytetrafluoroethylene fiber |
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|---|---|---|---|---|
| GB656300A (en) * | 1948-10-01 | 1951-08-22 | British Mechanical Prod Ltd | Production of rods, tubes and the like from polytetrafluorethylene |
| EP0451729A1 (en) * | 1990-04-06 | 1991-10-16 | Sumitomo Electric Industries, Ltd. | Surgical suture and process for producing same |
| EP1439247A1 (en) * | 2003-01-20 | 2004-07-21 | Yeu Ming Tai Chemical Industrial Co., Ltd. | Polytetrafluoroethylene fiber and method for manufacturing the same |
| CN101074500A (en) * | 2006-05-18 | 2007-11-21 | 上海市凌桥环保设备厂有限公司 | Method for producing polytef flocks |
| CN101967708A (en) * | 2010-09-10 | 2011-02-09 | 常州市兴诚高分子材料有限公司 | Production process of high-strength polytetrafluoroethylene wire for stitching |
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| CN102560714A (en) * | 2010-12-27 | 2012-07-11 | 山东嘉年华氟纶有限公司 | PTFE (Polytetrafluoroethylene) low-shrinkage crimped chopped fiber for filter needled-punched felt and manufacturing method of PTFE low-shrinkage crimped chopped fiber |
| CN202430355U (en) * | 2011-11-15 | 2012-09-12 | 厦门柏润氟材料科技有限公司 | Microwave sintering drafting device for pasty polytetrafluoroethylene extruded fibers |
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