CN105133064A - Preparation method for PTFE short fiber - Google Patents
Preparation method for PTFE short fiber Download PDFInfo
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- CN105133064A CN105133064A CN201510544464.3A CN201510544464A CN105133064A CN 105133064 A CN105133064 A CN 105133064A CN 201510544464 A CN201510544464 A CN 201510544464A CN 105133064 A CN105133064 A CN 105133064A
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Abstract
The invention relates to a preparation method for PTFE short fiber. The preparation method comprises the following steps that firstly, ultrasonic treatment is performed on a PTFE resin raw material; secondly, sintering is performed to form a crystalline workblank; thirdly, the crystalline workblank is added into a plastic extruder to perform extrusion to obtain a filamentous blank; fourthly, the filamentous blank is added into a stretcher to obtain thick fiber filaments; fifthly, the thick fiber filaments are added into a twisting machine to obtain a thick fiber filament material; sixthly, the fourth and fifth steps are executed one or two times repeatedly to obtain a fine fiber filament material; seventhly, the fine fiber filament material is added into a drawing machine to obtain long fiber filaments; eighthly, the long fiber filaments are cut through a cut-off machine to obtain short fiber; ninthly, the short fiber is added into a crimping machine to obtain the finished PRFE short fiber. According to the preparation method, the 100% pure PTFE is adopted to form the PTFE short fiber, the production cycle is short, the product quality is stable, and the obtained PTFE short fiber is resistant to high temperature, acid, alkali and corrosion and high in chemical stability.
Description
Technical field
The present invention relates to a kind of preparation method of PTFE staple fibre, belong to plastic optical fibre technology field.
Background technology
Polytetrafluoroethylene (PTFE) (Teflon or PTFE), be commonly called as " King ", be by the macromolecular compound of tetrafluoroethylene through being polymerized, there is excellent chemical stability, corrosion resistance, sealing, height lubricate not viscosity, electrical insulating property and good anti-aging endurance, can be used as engineering plastics; The filling of fiber can improve the strength and stiffness of plastics effectively, and reinforced plastics belongs to rigid structure material.
Polytetrafluoroethylene fibre production technology of the prior art, owing to adding auxiliary agent to improve performance during processing and forming, easily cause on finished product and contain a large amount of micropore, reduce material stiffness, simultaneously in drawing process, easily cause transverse breakage, product length, quality differ, and the problem such as also to pollute, but when not adding any auxiliary agent, ensureing that the Forming Quality of product, flexibility and degree of rigidity are suitable for, is the technological difficulties of this area.
Summary of the invention
The object of the invention is the defect for prior art, a kind of preparation method of PTFE staple fibre is provided, adopts 100% pure PTFE to make, with short production cycle, constant product quality, the PTFE staple fibre made is high temperature resistant, acid and alkali-resistance, corrosion-resistant, chemical stability is extremely strong.
The present invention is achieved by the following technical solutions.
A preparation method for PTFE staple fibre, its preparation method is as follows:
(1) by polyflon raw material ultrasonic process 30 ~ 50min at 25 ~ 35 DEG C;
(2) add in mould by the polyflon raw material after step (1) process, put into sintering furnace subsequently, control temperature is 330 ~ 475 DEG C of sintering 20 ~ 35min, makes the blank that degree of crystallinity is 20% ~ 40%;
(3) blank is added to the obtained thread blank of extruding in plastic extruder, the operating temperature controlling plastic extruder is 120 ~ 155 DEG C, and extruder head pressure is 10 ~ 20MPa, and rotating speed is 20 ~ 50r/min, and described thread blank diameter is 2 ~ 3cm;
(4) added in stretching-machine by thread blank and carry out thread blank tow and elongate obtained fiber crin, the operating temperature of restrained stretching machine is 165 ~ 210 DEG C, and linear velocity is 0.5 ~ 1.2m/min;
(5) added in stubborn machine by fiber crin and carry out fiber crin tow and add and be crafted to obtain filament coarse fodder, the operating temperature controlling to add stubborn machine is 65 ~ 130 DEG C, and linear velocity is 0.8 ~ 1.5m/min;
(6) repeat step (4) and step (5) 1 ~ 2 times, obtain the meticulous material of filament;
(7) meticulous for filament material is added in drawing machine, by the filament drawing-down in meticulous for filament material, obtained long fiber silk, the operating temperature controlling drawing machine is 85 ~ 150 DEG C, and linear velocity is 1.8 ~ 2.5m/min;
(8) long fiber silk is passed through cutting machine, by long fiber silk cutting short-forming fiber;
(9) staple fibre is added in crimping machine that to carry out staple fibre tow Texturized, obtained PTFE staple fibre finished product.
The preparation method of above-mentioned a kind of PTFE staple fibre, wherein, described fiber crin tow adds and is threaded through journey, and fiber crin is 2 ~ 5 strands.
The preparation method of above-mentioned a kind of PTFE staple fibre, wherein, the length of described staple fibre is 40 ~ 120mm.
The preparation method of above-mentioned a kind of PTFE staple fibre, wherein, described drawing machine comprises base, described base one end is provided with foot rest, the other end is provided with operating desk, described operating desk is provided with control button, described operating desk one end is welded simultaneously and is achieved a fixed connection with base, the other end is provided with casing, described casing is provided with baffle plate, described casing side is provided with feed end, opposite side is provided with collecting drum, described feed end place is provided with tank, collecting drum place is provided with dryer, drawing roller is provided with between described dryer and tank, described drawing roller is five, be crisscross arranged one on the other, the length R1 of described baffle plate is greater than the length R2 of drawing roller, described drawing roller comprises installation end, drawing-off end and positive stop end, the width r2 that the width r1 of described installation end is greater than drawing-off end is less than the width r3 of positive stop end.
The preparation method of above-mentioned a kind of PTFE staple fibre, wherein, the length of described installation end is L1, L1 is 3-5cm.
The preparation method of above-mentioned a kind of PTFE staple fibre, wherein, the length of described drawing-off end is L2, L2 is 10-15cm.
The preparation method of above-mentioned a kind of PTFE staple fibre, wherein, the length of described positive stop end is L3, L3 is 2-3cm.
Beneficial effect of the present invention is:
The present invention adopts 100% pure PTFE to make, do not add any auxiliary agent, utilize the controls such as the temperature in technique, pressure, reach superior plasticity, avoid in traditional handicraft the material stiffness reduction adding auxiliary agent and cause, transverse breakage in drawing process, the problems such as product length, quality differ, pollution; TFE raw material is carried out ultrasonic process, greatly reduces micropore in production process, improve end product quality, shorten the production cycle simultaneously; Fiber crin is repeated enter stretching-machine and add stubborn machine, improve finished product rigidity and tensile strength; Drawing machine can make the filament drawing-down in the meticulous material of filament, ensure that the being of close texture property of finished product.
To sum up, of the present invention with short production cycle, constant product quality, the PTFE staple fibre made is high temperature resistant, acid and alkali-resistance, corrosion-resistant, chemical stability is extremely strong, can be used for the chemical environment of the temperature environment of temperature-210 ~ 265 DEG C, high humidity environment and PH0-14, not easily aging.
Accompanying drawing explanation
Fig. 1 is the overall front view of drawing machine in the present invention.
Fig. 2 is drawing machine side view in the present invention.
Fig. 3 is drawing machine drawing roller structure chart in the present invention.
Detailed description of the invention
Below in conjunction with embodiment, the specific embodiment of the present invention is described further.
Embodiment 1
A preparation method for PTFE staple fibre, its preparation method is as follows:
(1) by polyflon raw material ultrasonic process 36min at 30 DEG C;
(2) add in mould by the polyflon raw material after step (1) process, put into sintering furnace subsequently, control temperature is 410 DEG C of sintering 28min, makes the blank that degree of crystallinity is 28%;
(3) blank is added to the obtained thread blank of extruding in plastic extruder, the operating temperature controlling plastic extruder is 130 DEG C, and extruder head pressure is 15MPa, and rotating speed is 25r/min, and described thread blank diameter is 2.2cm;
(4) added in stretching-machine by thread blank and carry out thread blank tow and elongate obtained fiber crin, the operating temperature of restrained stretching machine is 170 DEG C, and linear velocity is 0.8m/min;
(5) added in stubborn machine by fiber crin and carry out fiber crin tow and add and be crafted to obtain filament coarse fodder, described fiber crin tow adds and is threaded through journey, and fiber crin is 2 strands, and the operating temperature controlling to add stubborn machine is 112 DEG C, and linear velocity is 1.1m/min;
(6) repeat step (4) and step (5) 2 times, obtain the meticulous material of filament;
(7) meticulous for filament material is added in drawing machine, by the filament drawing-down in meticulous for filament material, obtained long fiber silk, the operating temperature controlling drawing machine is 96 DEG C, and linear velocity is 2.3m/min;
(8) long fiber silk is passed through cutting machine, by long fiber silk cutting short-forming fiber, the length of described staple fibre is 40 ~ 100mm.
(9) staple fibre is added in crimping machine that to carry out staple fibre tow Texturized, obtained PTFE staple fibre finished product.
Embodiment 2
A preparation method for PTFE staple fibre, its preparation method is as follows:
(1) by polyflon raw material ultrasonic process 35min at 32 DEG C;
(2) add in mould by the polyflon raw material after step (1) process, put into sintering furnace subsequently, control temperature is 365 DEG C of sintering 22min, makes the blank that degree of crystallinity is 33%;
(3) blank is added to the obtained thread blank of extruding in plastic extruder, the operating temperature controlling plastic extruder is 135 DEG C, and extruder head pressure is 14MPa, and rotating speed is 29r/min, and described thread blank diameter is 2.4cm;
(4) added in stretching-machine by thread blank and carry out thread blank tow and elongate obtained fiber crin, the operating temperature of restrained stretching machine is 175 DEG C, and linear velocity is 0.6m/min;
(5) added in stubborn machine by fiber crin and carry out fiber crin tow and add and be crafted to obtain filament coarse fodder, described fiber crin tow adds and is threaded through journey, and fiber crin is 4 strands, and the operating temperature controlling to add stubborn machine is 75 DEG C, and linear velocity is 1.2m/min;
(6) repeat step (4) and step (5) 1 times, obtain the meticulous material of filament;
(7) meticulous for filament material is added in drawing machine, by the filament drawing-down in meticulous for filament material, obtained long fiber silk, the operating temperature controlling drawing machine is 125 DEG C, and linear velocity is 2.5m/min;
(8) long fiber silk is passed through cutting machine, by long fiber silk cutting short-forming fiber, the length of described staple fibre is 60 ~ 110mm.
(9) staple fibre is added in crimping machine that to carry out staple fibre tow Texturized, obtained PTFE staple fibre finished product.
Embodiment 3
A preparation method for PTFE staple fibre, its preparation method is as follows:
(1) by polyflon raw material ultrasonic process 50min at 26 DEG C;
(2) add in mould by the polyflon raw material after step (1) process, put into sintering furnace subsequently, control temperature is 332 DEG C of sintering 35min, makes the blank that degree of crystallinity is 39%;
(3) blank is added to the obtained thread blank of extruding in plastic extruder, the operating temperature controlling plastic extruder is 135 DEG C, and extruder head pressure is 15MPa, and rotating speed is 30r/min, and described thread blank diameter is 3cm;
(4) added in stretching-machine by thread blank and carry out thread blank tow and elongate obtained fiber crin, the operating temperature of restrained stretching machine is 190 DEG C, and linear velocity is 0.6m/min;
(5) added in stubborn machine by fiber crin and carry out fiber crin tow and add and be crafted to obtain filament coarse fodder, described fiber crin tow adds and is threaded through journey, and fiber crin is 3 strands, and the operating temperature controlling to add stubborn machine is 115 DEG C, and linear velocity is 1.3m/min;
(6) repeat step (4) and step (5) 2 times, obtain the meticulous material of filament;
(7) meticulous for filament material is added in drawing machine, by the filament drawing-down in meticulous for filament material, obtained long fiber silk, the operating temperature controlling drawing machine is 125 DEG C, and linear velocity is 2.4m/min;
(8) long fiber silk is passed through cutting machine, by long fiber silk cutting short-forming fiber, the length of described staple fibre is 90mm.
(9) staple fibre is added in crimping machine that to carry out staple fibre tow Texturized, obtained PTFE staple fibre finished product.
As embodiment 1, 2, drawing machine described in 3, comprise base 1, described base 1 one end is provided with foot rest 2, the other end is provided with operating desk 3, described operating desk 3 is provided with control button 4, described operating desk 3 one end is welded simultaneously and is achieved a fixed connection with base 1, the other end is provided with casing 5, described casing 5 is provided with baffle plate 6, described casing 5 side is provided with feed end 7, opposite side is provided with collecting drum 8, described feed end 7 place is provided with tank 9, collecting drum 8 place is provided with dryer 10, drawing roller 11 is provided with between described dryer 10 and tank 9, described drawing roller 11 is five, be crisscross arranged one on the other, the length R1 of described baffle plate 6 is greater than the length R2 of drawing roller 11, described drawing roller 11 comprises installation end 12, drawing-off end 13 and positive stop end 14, the width r2 that the width r1 of described installation end 12 is greater than drawing-off end 13 is less than the width r3 of positive stop end 14, the length of described installation end 12 is L1, L1 is 3-5cm, the length of drawing-off end 13 is L2, L2 is 10-15cm, the length of positive stop end 14 is L3, L3 is 2-3cm.
Of the present invention with short production cycle, constant product quality, the PTFE staple fibre made is high temperature resistant, acid and alkali-resistance, corrosion-resistant, chemical stability is extremely strong, can be used for the chemical environment of the temperature environment of temperature-210 ~ 265 DEG C, high humidity environment and PH0-14, not easily aging.
Above are only the present invention's preferably detailed description of the invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses, the change that can expect easily or replacement, all should be encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (7)
1. a preparation method for PTFE staple fibre, is characterized by, and its preparation method is as follows:
(1) by polyflon raw material ultrasonic process 30 ~ 50min at 25 ~ 35 DEG C;
(2) add in mould by the polyflon raw material after step (1) process, put into sintering furnace subsequently, control temperature is 330 ~ 475 DEG C of sintering 20 ~ 35min, makes the blank that degree of crystallinity is 20% ~ 40%;
(3) blank is added to the obtained thread blank of extruding in plastic extruder, the operating temperature controlling plastic extruder is 120 ~ 155 DEG C, and extruder head pressure is 10 ~ 20MPa, and rotating speed is 20 ~ 50r/min, and described thread blank diameter is 2 ~ 3cm;
(4) added in stretching-machine by thread blank and carry out thread blank tow and elongate obtained fiber crin, the operating temperature of restrained stretching machine is 165 ~ 210 DEG C, and linear velocity is 0.5 ~ 1.2m/min;
(5) added in stubborn machine by fiber crin and carry out fiber crin tow and add and be crafted to obtain filament coarse fodder, the operating temperature controlling to add stubborn machine is 65 ~ 130 DEG C, and linear velocity is 0.8 ~ 1.5m/min;
(6) repeat step (4) and step (5) 1 ~ 2 times, obtain the meticulous material of filament;
(7) meticulous for filament material is added in drawing machine, by the filament drawing-down in meticulous for filament material, obtained long fiber silk, the operating temperature controlling drawing machine is 85 ~ 150 DEG C, and linear velocity is 1.8 ~ 2.5m/min;
(8) long fiber silk is passed through cutting machine, by long fiber silk cutting short-forming fiber;
(9) staple fibre is added in crimping machine that to carry out staple fibre tow Texturized, obtained PTFE staple fibre finished product.
2. the preparation method of a kind of PTFE staple fibre as claimed in claim 1, is characterized by, and described fiber crin tow adds and is threaded through journey, and fiber crin is 2 ~ 5 strands.
3. the preparation method of a kind of PTFE staple fibre as claimed in claim 1, is characterized by, and the length of described staple fibre is 40 ~ 120mm.
4. the preparation method of a kind of PTFE staple fibre as claimed in claim 1, it is characterized by, described drawing machine comprises base, described base one end is provided with foot rest, the other end is provided with operating desk, described operating desk is provided with control button, described operating desk one end is welded simultaneously and is achieved a fixed connection with base, the other end is provided with casing, described casing is provided with baffle plate, described casing side is provided with feed end, opposite side is provided with collecting drum, described feed end place is provided with tank, collecting drum place is provided with dryer, drawing roller is provided with between described dryer and tank, described drawing roller is five, be crisscross arranged one on the other, the length R1 of described baffle plate is greater than the length R2 of drawing roller, described drawing roller comprises installation end, drawing-off end and positive stop end, the width r2 that the width r1 of described installation end is greater than drawing-off end is less than the width r3 of positive stop end.
5. the preparation method of a kind of PTFE staple fibre as claimed in claim 4, is characterized by, and the length of described installation end is L1, L1 is 3-5cm.
6. the preparation method of a kind of PTFE staple fibre as claimed in claim 4, is characterized by, and the length of described drawing-off end is L2, L2 is 10-15cm.
7. the preparation method of a kind of PTFE staple fibre as claimed in claim 4, is characterized by, and the length of described positive stop end is L3, L3 is 2-3cm.
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| CN201510544464.3A CN105133064B (en) | 2015-08-31 | 2015-08-31 | A kind of preparation method of PTFE chopped fibers |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| EP0451729A1 (en) * | 1990-04-06 | 1991-10-16 | Sumitomo Electric Industries, Ltd. | Surgical suture and process for producing same |
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| 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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| CN105133064B (en) | 2017-06-20 |
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