CN106637451A - Method for preparing polytetrafluoroethylene microfibers - Google Patents
Method for preparing polytetrafluoroethylene microfibers Download PDFInfo
- Publication number
- CN106637451A CN106637451A CN201611222844.6A CN201611222844A CN106637451A CN 106637451 A CN106637451 A CN 106637451A CN 201611222844 A CN201611222844 A CN 201611222844A CN 106637451 A CN106637451 A CN 106637451A
- Authority
- CN
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- Prior art keywords
- polytetrafluoroethylene
- ptfe
- microfibre
- fibrillation
- preparation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/42—Formation of filaments, threads, or the like by cutting films into narrow ribbons or filaments or by fibrillation of films or filaments
- D01D5/426—Formation of filaments, threads, or the like by cutting films into narrow ribbons or filaments or by fibrillation of films or filaments by cutting films
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/02—Loose filtering material, e.g. loose fibres
- B01D39/04—Organic material, e.g. cellulose, cotton
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F6/08—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polymers of halogenated hydrocarbons
- D01F6/12—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polymers of halogenated hydrocarbons from polymers of fluorinated hydrocarbons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/02—Types of fibres, filaments or particles, self-supporting or supported materials
- B01D2239/0208—Single-component fibres
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Textile Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Artificial Filaments (AREA)
- Paper (AREA)
Abstract
The invention relates to a method for preparing polytetrafluoroethylene microfibers. The main process disclosed by the invention comprises the following steps: stirring a polytetrafluoroethylene dispersion resin into paste, extruding, rolling into band, deoiling, sintering, stretching, splitting and winding; stretching and splitting again the wound polytetrafluoroethylene fine filament fibers to obtain the polytetrafluoroethylene microfibers, wherein the fineness is less than or equal to 1Dtex. The felts and fiber paper prepared by using the polytetrafluoroethylene microfibers obtained by the method disclosed by the invention have the advantages of excellent heat resistance, chemical resistance, non-sticky property, insulating property, long service life and the like and can be used for high-temperature corrosive solution and filtration of high-precision vapor-liquid phase.
Description
Technical field
The present invention relates to processing of high molecular material application, and in particular to one kind has heatproof, resistance to chemical attack, no
The preparation method of the polytetrafluoroethylene (PTFE) microfibres of excellent properties such as viscous, insulation.
Background technology
Polytetrafluoroethylene (PTFE) (PTFE) fiber have excellent heat resistance, resistance to chemical attack, coefficient of friction it is low, not viscous, fire-retardant,
The advantages such as electrical insulating property, are used for the fields such as waste incineration, the smoke filtration of coal-burning power plant, fire-fighting and biochemical defence suit, liquid filtration.
In recent years, the microfibre (≤1Dtex) for the special dimension such as high-precision filtration, fire-retardant, corrosion-resistant is subject to extensive
Concern.The method that preparing the material of microfibre mainly has nylon, aramid fiber, carbon fiber, polytetrafluoroethylene (PTFE) etc., processing has melting extrusion
Method, solution spinning, carrier spin processes, that film splits method etc. is various.Due to the particularity of polyflon, it is impossible to using melting
Extrusion and solution spinning technique, so process technology is unique.At present polytetrafluoroethylene fibre can pass through carrier spin processes, pasty state
Extrusion molding splits method and is obtained with film, but the operation of carrier spin processes is more, needs using various chemical raw materials as auxiliary agent, is also easy to produce
Environmental issue, and yield poorly, production cost is high.Splitting method technique using film can prolong on the basis of ripe pasty state expressing technique
Exhibition, cost is relatively low, is capable of achieving economization large-scale production.
Because the property of polyflon, process control difficulty are big, fiber is in negative electrical charge, and surface is than electricity
Resistance is big, and coefficient of friction is low between fiber, and fibrillation combing is difficult, to reach and require higher microfibre, technology than fine fibre fiber number
Key is the realization and control of stretching and fiber opening process, especially stretching twice and fiber opening process.
Therefore seek a kind of with low cost, prepare the method for the polytetrafluoroethylene fibre with premium properties to closing weight
Will.
The content of the invention
For the deficiency of the existing production technology of polytetrafluoroethylene fibre, the present invention provides a kind of method simply, with low cost,
The preparation method of the polytetrafluoroethylene (PTFE) microfibre of products obtained therefrom function admirable.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of preparation method of polytetrafluoroethylene (PTFE) microfibre, the method is followed the steps below：
1. polytetrafluoroethyldispersion dispersion resin is stirred into that pasty state is extruded, rolls, deoils, sintering film forming；
2. the film stretching fibrillation for 1. step being sintered, it is 4～10Dtex long filament fine fibres that fiber number is obtained；
3. by step long filament fine fibre 2. fibrillation again, fiber number is obtained for≤1Dtex polytetrafluoroethylfilament filament microfibres；
4. by step 3. polytetrafluoroethylene (PTFE) microfibre, the short microfibre of different length is cut into peeler, to adapt to difference
The requirement of user.
Used as limitation of the invention, 1. middle poly tetrafluoroethylene stirs into pasty state Jing and squeezes step of the present invention by dispersion resin
Go out, roll, deoil at 200～280 DEG C, sinter film forming at 350～390 DEG C according to solvent for use oil.
Used as limitation of the invention, 2. middle poly tetrafluoroethylene adopts split film process fibrillation to step, at 340～380 DEG C
Lower 40～80 times of machine-direction oriented processes of stretching are obtained；The step 2. in the rotated needle-like roller fibrillation of stretched film into fine fibre
Long filament, installs fine needle on fibrillation roller, packing density is 25～100 pin every square centimeter, and Jing fibrillation forms the winding of long filament fine fibre；
As limitation of the invention, the step 3., by long filament fine fibre fibrillation again, the roller surface of second fibrillation
Using blade structure, it is 20～80 per cm that the blade of its fibrillation roller intersects packing density.Fiber Jing after stretching twice is i.e.
For long filament microfibre, fiber number≤1Dtex winds again；
4. the rotated cutting machine of long filament microfibre of winding, is cut into the short microfibre (2.5 of different length by the step
～8.0cm), to meet the demand of different purposes.
The step 2. 3. in polytetrafluoroethylene fibre fiber number can adjust, by equipment and technology adjust, fibre can be obtained
Spend the fine and fine fibre of the different size for≤1～10Dtex.
Polytetrafluoroethylene (PTFE) microfibre of the present invention can be by lapping acupuncture, water jet process and polytetrafluoroethylene (PTFE) base fabric knot
Close, felt is obtained, or fibrous paper is obtained using wet method copy paper method and lapping legal system, can be applicable to liquid phase gas phase filtration, environmental protection industry
In.
After above-mentioned technical proposal, the beneficial effect that the present invention is obtained is：
The present invention adopt polytetrafluoroethylene (PTFE) (PTFE) dispersion resin pasty state film extrusion, it is sintered, stretching, fibrillation, then
Fibrillation is redrawn, polytetrafluoroethylene (PTFE) microfibre is obtained.This preparation method is added sintering, is drawn based on conventional pasty state expressing technique
Stretch, fiber opening process, technological process rationally, is capable of achieving serialization, consumes energy low, except solvent naphtha is as propellant and effectively reclaims again sharp
With outer, without other additions and discharge chemical substance, safety and environmental protection, production efficiency height.Polytetrafluoroethylene fibre is except with excellent
Heat resistance, stability, do not glue, it is fire-retardant the advantages of, its microfibre can be used for high-precision filtration, and actual measurement gas filtration precision is reachable
≤10mg/m3, and life-span length is the rare material of chemical separating, the class of field of environment protection one.
Description of the drawings
Fig. 1 is the technique and equipment flowsheet of the present invention
It is 4～10Dtex polytetrafluoroethylene (PTFE) thin fiber optic microphotographs that Fig. 2 is fiber number
Fig. 3 is that fiber number is≤1Dtex polytetrafluoroethylene (PTFE) microfibre optical microscope photographs
Specific embodiment
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate the present invention
Rather than restriction the scope of the present invention, it should also be understood that after the content for having read instruction of the present invention, those skilled in the art
Various changes or modification can be made to the present invention, these equivalent form of values are equally applicable to the application appended claims and are limited
Scope.
In the embodiment of the present application：
Polytetrafluoroethylene (PTFE) (PTFE) dispersion resin：The DF-204 of Shandong Eastern Mountain Chemical Group production；Specification is：The μ of particle diameter 150
M, SSG 2.17, tensile strength 33MPa.
Embodiment 1
Solvent naphtha is adopted for kerosene 20% (Wt%), dispersion resin is mixed, be positioned in 50 DEG C of environment and cure
20 hours, pasty state extrusion at room temperature rolled flakiness, 250 ± 10 DEG C of oil removings of Jing, then in 370 ± 5 DEG C of sintering, 350 ±
5 DEG C of stretchings, 60 times of stretching ratio, Jing needle-likes fibrillation roller fibrillation is 4～10Dtex long filament fine fibres into fiber number.
By above-mentioned long filament fine fibre Jing blade-like fibrillation second fibrillation of roller, fiber number≤1Dtex long filament microfibres are formed.
Embodiment 2
Solvent naphtha is adopted for kerosene 20% (Wt%), dispersion resin is mixed, be positioned in 50 DEG C of environment and cure
20 hours, pasty state extrusion at room temperature rolled flakiness, 250 ± 10 DEG C of oil removings of Jing, then in 355 ± 5 DEG C of sintering, 370 ±
5 DEG C of stretchings, 50 times of stretching ratio, Jing needle-likes fibrillation roller fibrillation is 4～10Dtex long filament fine fibres into fiber number.
By above-mentioned long filament fine fibre Jing blade-like fibrillation second fibrillation of roller, fiber number≤1Dtex long filament microfibres are formed.
Embodiment 3
Solvent naphtha is adopted for kerosene 20% (Wt%), dispersion resin is mixed, be positioned in 50 DEG C of environment and cure
20 hours, pasty state extrusion at room temperature rolled flakiness, 250 ± 10 DEG C of oil removings of Jing, then in 385 ± 5 DEG C of sintering, 375 ±
5 DEG C of stretchings, 80 times of stretching ratio, Jing needle-likes fibrillation roller fibrillation is 4～10Dtex long filament fine fibres into fiber number.
By above-mentioned long filament fine fibre Jing blade-like fibrillation second fibrillation of roller, fiber number≤1Dtex long filament microfibres are formed.
Embodiment 4
Solvent naphtha is adopted for kerosene 20% (Wt%), dispersion resin is mixed, be positioned in 50 DEG C of environment and cure
20 hours, pasty state extrusion at room temperature rolled flakiness, 250 ± 10 DEG C of oil removings of Jing, then in 365 ± 5 DEG C of sintering, 345 ±
5 DEG C of stretchings, 40 times of stretching ratio, Jing needle-likes fibrillation roller fibrillation is 4～10Dtex long filament fine fibres into fiber number.
By above-mentioned long filament fine fibre Jing blade-like fibrillation second fibrillation of roller, fiber number≤1Dtex long filament microfibres are formed.
According to the demand of user, long filament microfibre peeler is cut into the short microfibre of different length.
Claims (6)
1. a kind of preparation method of polytetrafluoroethylene (PTFE) microfibre, it is characterised in that the method is followed the steps below：
1. polytetrafluoroethyldispersion dispersion resin is stirred into that pasty state is extruded, rolls, deoils, sintering film forming；
2. the film stretching fibrillation for 1. step being sintered, it is 4～10Dtex long filament fine fibres that fiber number is obtained；
3. by step long filament fine fibre 2. fibrillation again, fiber number is obtained for≤1Dtex polytetrafluoroethylfilament filament microfibres；
4. by step 3. polytetrafluoroethylene (PTFE) microfibre, the short microfibre of different length is cut into peeler, to adapt to different user
Requirement.
2. the preparation method of a kind of polytetrafluoroethylene (PTFE) microfibre according to claim 1, it is characterised in that step 1. in gather
Tetrafluoroethylene by dispersion resin stir into pasty state it is extruded, calendering, according to solvent for use oil deoil at 200～280 DEG C,
Film forming is sintered at 350～390 DEG C.
3. the preparation method of a kind of polytetrafluoroethylene (PTFE) microfibre according to claim 1, it is characterised in that step 2. in gather
Tetrafluoroethylene adopts split film process fibrillation, 40～80 times of machine-direction oriented processes is stretched at 340～380 DEG C and is obtained.
4. the preparation method of a kind of polytetrafluoroethylene (PTFE) microfibre according to claim 1, it is characterised in that：The step is 2.
In polytetrafluoroethylene (PTFE) fiber opening process using rotation needle-like roller, wherein on roller every square centimeter arrange 25～100 pins, step is 3.
In second fiber opening process adopt rotating blade roller, wherein 20～80 knives of cross arrangement on roller per cm.
5. the preparation method of a kind of polytetrafluoroethylene (PTFE) microfibre according to claim 1, it is characterised in that：The step is 2.
3. polytetrafluoroethylene fibre fiber number in can adjust, and be adjusted by equipment and technology, can be obtained fiber number be≤1～10Dtex not
The fine and fine fibre of same specification, to meet different needs.
6. the preparation method of a kind of polytetrafluoroethylene (PTFE) microfibre according to claim 1, it is characterised in that：Described poly- four
PVF microfibre can be combined by lapping acupuncture, water jet process with polytetrafluoroethylene (PTFE) base fabric, and felt is obtained, or be copied using wet method
Paper method obtains fibrous paper with lapping legal system, in can be applicable to liquid phase gas phase filtration, environmental protection industry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611222844.6A CN106637451A (en) | 2016-12-27 | 2016-12-27 | Method for preparing polytetrafluoroethylene microfibers |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611222844.6A CN106637451A (en) | 2016-12-27 | 2016-12-27 | Method for preparing polytetrafluoroethylene microfibers |
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| Publication Number | Publication Date |
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| CN106637451A true CN106637451A (en) | 2017-05-10 |
Family
ID=58832524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611222844.6A Pending CN106637451A (en) | 2016-12-27 | 2016-12-27 | Method for preparing polytetrafluoroethylene microfibers |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107213700A (en) * | 2017-07-28 | 2017-09-29 | 江苏金由新材料有限公司 | It is a kind of that there is PTFE high temperature filter bags of catalytic decomposition function and preparation method thereof |
| 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 |
| CN111892811A (en) * | 2020-07-07 | 2020-11-06 | 浙江恒澜科技有限公司 | Anti-dripping polyamide 6 and preparation method thereof |
| CN112575400A (en) * | 2020-12-22 | 2021-03-30 | 福建省骏旗机械工贸有限公司 | Polytetrafluoroethylene short fiber forming production device and working method thereof |
| CN113046855A (en) * | 2021-03-23 | 2021-06-29 | 苏州大学 | Low linear density bundle-shaped polytetrafluoroethylene filament and preparation process and application thereof |
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| 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 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107213700A (en) * | 2017-07-28 | 2017-09-29 | 江苏金由新材料有限公司 | It is a kind of that there is PTFE high temperature filter bags of catalytic decomposition function and preparation method thereof |
| 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 |
| CN111892811A (en) * | 2020-07-07 | 2020-11-06 | 浙江恒澜科技有限公司 | Anti-dripping polyamide 6 and preparation method thereof |
| CN111892811B (en) * | 2020-07-07 | 2022-12-27 | 浙江恒逸石化研究院有限公司 | Anti-dripping polyamide 6 and preparation method thereof |
| CN112575400A (en) * | 2020-12-22 | 2021-03-30 | 福建省骏旗机械工贸有限公司 | Polytetrafluoroethylene short fiber forming production device and working method thereof |
| CN112575400B (en) * | 2020-12-22 | 2023-10-20 | 福建省骏旗机械工贸有限公司 | Polytetrafluoroethylene short fiber forming production device and working method thereof |
| CN113046855A (en) * | 2021-03-23 | 2021-06-29 | 苏州大学 | Low linear density bundle-shaped polytetrafluoroethylene filament and preparation process and application thereof |
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