CN1974898A - Teflon sewing thread producing process - Google Patents
Teflon sewing thread producing process Download PDFInfo
- Publication number
- CN1974898A CN1974898A CN 200610155053 CN200610155053A CN1974898A CN 1974898 A CN1974898 A CN 1974898A CN 200610155053 CN200610155053 CN 200610155053 CN 200610155053 A CN200610155053 A CN 200610155053A CN 1974898 A CN1974898 A CN 1974898A
- Authority
- CN
- China
- Prior art keywords
- sewing thread
- preparation
- ptfe
- polytetrafluoroethylene
- high temperature
- 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.)
- Granted
Links
- 238000009958 sewing Methods 0.000 title claims abstract description 29
- 239000004809 Teflon Substances 0.000 title claims abstract description 28
- 229920006362 Teflon® Polymers 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 21
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 70
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 70
- 239000000314 lubricant Substances 0.000 claims abstract description 23
- 238000002156 mixing Methods 0.000 claims abstract description 6
- -1 polytetrafluoroethylene Polymers 0.000 claims description 35
- 238000002360 preparation method Methods 0.000 claims description 20
- 229920006361 Polyflon Polymers 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 13
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 5
- 230000001737 promoting effect Effects 0.000 claims description 5
- 238000012216 screening Methods 0.000 claims description 5
- 239000000839 emulsion Substances 0.000 claims description 2
- 229930195733 hydrocarbon Natural products 0.000 claims description 2
- 150000002430 hydrocarbons Chemical class 0.000 claims description 2
- 239000003921 oil Substances 0.000 claims description 2
- 239000003960 organic solvent Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 238000006116 polymerization reaction Methods 0.000 claims description 2
- 230000005855 radiation Effects 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000003825 pressing Methods 0.000 abstract 1
- 239000011347 resin Substances 0.000 abstract 1
- 229920005989 resin Polymers 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920000784 Nomex Polymers 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000004763 nomex Substances 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical compound FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Lubricants (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The present invention discloses Teflon sewing thread producing process. The production process includes the first mixing PTFE resin and lubricant, the subsequent curing, pressing shape, extruding strand silk, high temperature relaxation, high temperature drawing and other steps. The Teflon sewing thread thus produced has diameter of 0.7-1.1 mm, breaking strength of 3.6-4.5 g/denier, and elongation at break of 13-22 %. It has high quality and may be used in high temperature dedusting bag. Compared with available technology, the present invention has the advantages of simple technological process, low production cost, etc.
Description
Technical field
The invention belongs to the sewing thread technology of preparing, specifically a kind of preparation method of teflon sewing thread.
Background technology
Special teflon (TEFLON, chemical name are polytetrafluoroethylene (PTFE)) is the registration mark of du pont company, because of it is a kind of inert chemical substance, has low friction, corrosion-resistant, high-low temperature resistant, outstanding advantage such as fire-retardant, and well-known.This material can be processed into goods such as film, pipe fitting, fiber, sealing ring, sheet material, is widely used in a plurality of technical fields.
Along with the deterioration of environment and the raising of people's environmental consciousness, discharging to the flue dust in the high-temperature tail gas is had higher requirement, and is that the Nomex sack cleaner of raw material is developed rapidly with high-temperature fibres such as glass fibre, polytetrafluoroethylene fibre, polyphenylene sulfides.But this material needs resistant to elevated temperatures sewing thread to sew up in being processed into the process of filter bag.The polytetrafluoroethylene (PTFE) sewing threads that adopt are sewed up more in the world wide at present.The general employing of its processing method split embrane method, be about to polyflon and be processed into film or fine and close sintering cylinder, adopt special installation to be cut into the faciola silk then, at the above sintering of fusing point (327 ℃), (described in United States Patent (USP) 5364699,5288552,5281475,5591526,6238605) made in drawn and heat treatment more again.This technology is high to the crush cutting equipment precision requirement, thereby causes production cost too high.
Summary of the invention
The preparation method who the purpose of this invention is to provide a kind of teflon sewing thread, this method mix polyflon, lubricant, and again through overcuring, pressed compact is extruded operations such as strand, high temperature relaxation processes, drawing by high temperature and made.
The technology side that the present invention adopts
Concrete, the preparation method of teflon sewing thread of the present invention may further comprise the steps:
A, mixed and screening
Lubricant is joined in the polyflon, place the enough drying receptacles of capacity that have airtight stopper to mix, for promoting to mix, 1/3～2/3 space of container capacity keeps idle, after the mixing, hermetic seals this container to prevent the lubricant volatilization;
B, slaking
After mixed, shake airtight container 20～40 minutes with dispersed lubricant, leave standstill, polyflon is fully mixed with fluid lubricant, slaking then forms polytetrafluoroethylene (PTFE) and mixes material;
C, pressed compact and extrude strand
Adopt harder at normal temperatures, 1kg/cm with the mixed material of described polytetrafluoroethylene (PTFE)
2Down compacting 1 minute of pressure, form cylindrical blank, blank diameter 10mm, long 25mm adopts and annotates the plug extruder and extrude formation polytetrafluoroethylene (PTFE) strand;
D, high temperature relaxation processes
Described polytetrafluoroethylene (PTFE) strand is carried out the high temperature relaxation processes, form orientation polytetrafluoroethylene (PTFE) strand;
E, drawing by high temperature
Described orientation polytetrafluoroethylene (PTFE) strand is carried out drawing by high temperature, the preparation teflon sewing thread.
Used polyflon adopts emulsion polymerisation or radiation polymerization to form, and particle diameter is in 0.1～0.5 mu m range.
Used lubricant is the organic solvent or the oils solvent of hydro carbons.
Among the described step a, lubricant weight is 15～50% of polyflon weight.
Among the described step b, dwell temperature is 0～60 ℃, 60～180 hours time.
Among the described step b, curing temperature is 40～90 ℃, time 8-30 hour.
Among the described step c, polytetrafluoroethylene (PTFE) strand diameter 2～5mm.
In the described steps d, the high temperature relaxation processes is: handled 30 minutes～2 hours down for 340～360 ℃ in temperature, reduce to normal temperature with 0.5～5 ℃/minute speed then.
Among the described step e, the drawing by high temperature temperature is 370～400 ℃, stretches 30～60 times with 10～20 meters/minute speed.
Compared with the prior art the present invention has following advantage:
(1) preparation method of teflon sewing thread of the present invention can adopt traditional harder, annotate equipment such as plug extruder, high temperature, stretching, do not dispose special high-precision crush cutting equipment, therefore production cost can reduce production costs widely well below splitting embrane method.
(2) preparation method of teflon sewing thread of the present invention is because of adopting paste-extruded technology, so the working (machining) efficiency height.
The specific embodiment
Embodiment 1:
A, mixed and screening
0.15 kilogram of kerosene is joined 1 kilogram of polyflon (F104, available from Daikin company) in, place the enough drying receptacles of capacity that have airtight stopper to mix, for promoting to mix, it is idle that 1/3～2/3 space of container capacity keeps, after the mixing, hermetic seal this container to prevent the lubricant volatilization;
B, slaking
After mixed, shake about 30 minutes of airtight container, under 0 ℃ temperature, left standstill 180 hours, polyflon is fully mixed with fluid lubricant,, form polytetrafluoroethylene (PTFE) and mix material then 40 ℃ of following slakings 30 hours with dispersed lubricant;
C, pressed compact and extrude strand
Adopt harder at normal temperatures, 1kg/cm with the mixed material of described polytetrafluoroethylene (PTFE)
2Down compacting 1 minute of pressure, form cylindrical blank, blank diameter 10mm, long 25mm adopts and annotates the plug extruder and extrude, the formation diameter is a 2mm polytetrafluoroethylene (PTFE) strand;
D, high temperature relaxation processes
Described polytetrafluoroethylene (PTFE) strand was handled 2 hours down for 340 ℃ in temperature, reduced to normal temperature with 0.5 ℃/minute speed then, form orientation polytetrafluoroethylene (PTFE) strand;
E, drawing by high temperature
Described orientation polytetrafluoroethylene (PTFE) strand under 370 ℃ temperature, is stretched 30 times the preparation teflon sewing thread with 10 meters/minute speed.
The teflon sewing thread diameter that obtains by said method is 0.8mm, and fracture strength was 3.6 gram/dawn, elongation at break 22%.
Embodiment 2:
A, mixed and screening
0.5 kilogram of isopar-E is joined 1 kilogram of polyflon (F104, available from Daikin company) in, place the enough drying receptacles of capacity that have airtight stopper to mix, for promoting to mix, it is idle that 1/3～2/3 space of container capacity keeps, after the mixing, hermetic seal this container to prevent the lubricant volatilization;
B, slaking
After mixed, shake about 30 minutes of airtight container, under 60 ℃ temperature, left standstill 60 hours, polyflon is fully mixed with fluid lubricant,, form polytetrafluoroethylene (PTFE) and mix material then 90 ℃ of following slakings 8 hours with dispersed lubricant;
C, pressed compact and extrude strand
Adopt harder at normal temperatures, 1kg/cm with the mixed material of described polytetrafluoroethylene (PTFE)
2Down compacting 1 minute of pressure, form cylindrical blank, blank diameter 10mm, long 25mm adopts and annotates the plug extruder and extrude, the formation diameter is a 5mm polytetrafluoroethylene (PTFE) strand;
D, high temperature relaxation processes
Described polytetrafluoroethylene (PTFE) strand was handled 30 minutes down for 360 ℃ in temperature, reduced to normal temperature with 5 ℃/minute speed then, form orientation polytetrafluoroethylene (PTFE) strand;
E, drawing by high temperature
Described orientation polytetrafluoroethylene (PTFE) strand under 400 ℃ temperature, is stretched 60 times the preparation teflon sewing thread with 20 meters/minute speed.
The teflon sewing thread diameter that obtains by said method is 1.1mm, and fracture strength was 4.5 gram/dawn, elongation at break 13%.
Embodiment 3:
A, mixed and screening
0.35 kilogram of smoil P-55 is joined 1 kilogram of polyflon (F104, available from Daikin company) in, place the enough drying receptacles of capacity that have airtight stopper to mix, for promoting to mix, it is idle that 1/3～2/3 space of container capacity keeps, after the mixing, hermetic seal this container to prevent the lubricant volatilization;
B, slaking
After mixed, shake about 30 minutes of airtight container, under 30 ℃ temperature, left standstill 100 hours, polyflon is fully mixed with fluid lubricant,, form polytetrafluoroethylene (PTFE) and mix material then 60 ℃ of following slakings 20 hours with dispersed lubricant;
C, pressed compact and extrude strand
Adopt harder at normal temperatures, 1kg/cm with the mixed material of described polytetrafluoroethylene (PTFE)
2Down compacting 1 minute of pressure, form cylindrical blank, blank diameter 10mm, long 25mm adopts and annotates the plug extruder and extrude, the formation diameter is a 3mm polytetrafluoroethylene (PTFE) strand;
D, high temperature relaxation processes
Described polytetrafluoroethylene (PTFE) strand was handled 1 hour down for 350 ℃ in temperature, reduced to normal temperature with 2 ℃/minute speed then, form orientation polytetrafluoroethylene (PTFE) strand;
E, drawing by high temperature
Described orientation polytetrafluoroethylene (PTFE) strand under 380 ℃ temperature, is stretched 45 times the preparation teflon sewing thread with 15 meters/minute speed.
The teflon sewing thread diameter that obtains by said method is 0.7mm, and fracture strength was 4.0 gram/dawn, elongation at break 15%.
Claims (9)
1. the preparation method of a teflon sewing thread, this method may further comprise the steps:
A, mixed and screening
Lubricant is joined in the polyflon, place the enough drying receptacles of capacity that have airtight stopper to mix, for promoting to mix, 1/3～2/3 space of container capacity keeps idle, after the mixing, hermetic seals this container to prevent the lubricant volatilization;
B, slaking
After mixed, shake airtight container 20～40 minutes with dispersed lubricant, leave standstill, polyflon is fully mixed with fluid lubricant, slaking then forms polytetrafluoroethylene (PTFE) and mixes material;
C, pressed compact and extrude strand
Adopt harder at normal temperatures, 1kg/cm with the mixed material of described polytetrafluoroethylene (PTFE)
2Down compacting 1 minute of pressure, form cylindrical blank, blank diameter 10mm, long 25mm adopts and annotates the plug extruder and extrude formation polytetrafluoroethylene (PTFE) strand;
D, high temperature relaxation processes
Described polytetrafluoroethylene (PTFE) strand is carried out the high temperature relaxation processes, form orientation polytetrafluoroethylene (PTFE) strand;
E, drawing by high temperature
Described orientation polytetrafluoroethylene (PTFE) strand is carried out drawing by high temperature, the preparation teflon sewing thread.
2. according to the preparation method of the described a kind of teflon sewing thread of claim 1, it is characterized in that among the described step a that used polyflon adopts emulsion polymerisation or radiation polymerization to form, particle diameter is in 0.1～0.5 mu m range.
3. according to the preparation method of the described a kind of teflon sewing thread of claim 1, it is characterized in that among the described step a that used lubricant is the organic solvent or the oils solvent of hydro carbons.
4. according to the preparation method of the described a kind of teflon sewing thread of claim 1, it is characterized in that among the described step a that lubricant weight is 15～50% of polyflon weight.
5. according to the preparation method of the described a kind of teflon sewing thread of claim 1, it is characterized in that among the described step b that dwell temperature is 0～60 ℃, 60～180 hours time.
6. according to the preparation method of the described a kind of teflon sewing thread of claim 1, it is characterized in that among the described step b that curing temperature is 40～90 ℃, time 8-30 hour.
7. according to the preparation method of the described a kind of teflon sewing thread of claim 1, it is characterized in that among the described step c polytetrafluoroethylene (PTFE) strand diameter 2～5mm.
8. according to the preparation method of the described a kind of teflon sewing thread of claim 1, it is characterized in that in the described steps d, the high temperature relaxation processes is: handled 30 minutes～2 hours down for 340～360 ℃ in temperature, reduce to normal temperature with 0.5-5 ℃/minute speed then.
9. according to the preparation method of the described a kind of teflon sewing thread of claim 1, it is characterized in that among the described step e that the drawing by high temperature temperature is 370～400 ℃, stretch 30～60 times with 10～20 meters/minute speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101550536A CN100494532C (en) | 2006-12-07 | 2006-12-07 | Teflon sewing thread producing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101550536A CN100494532C (en) | 2006-12-07 | 2006-12-07 | Teflon sewing thread producing process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1974898A true CN1974898A (en) | 2007-06-06 |
| CN100494532C CN100494532C (en) | 2009-06-03 |
Family
ID=38125237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101550536A Expired - Fee Related CN100494532C (en) | 2006-12-07 | 2006-12-07 | Teflon sewing thread producing process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100494532C (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101962839A (en) * | 2010-09-10 | 2011-02-02 | 常州市兴诚高分子材料有限公司 | Process for producing polytetrafluoroethylene yarn for enhancing fabrics |
| 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 |
| CN102051723A (en) * | 2009-10-28 | 2011-05-11 | 上海金由氟材料有限公司 | Coupling wire of FRP (Fiber Reinforced Plastics) and PTFE (Polytetrafluoroethylene) fiber |
| CN102102232A (en) * | 2010-11-22 | 2011-06-22 | 宋朋泽 | Method for preparing polytetrafluoroethylene fiber in drawing manner |
| CN102493007A (en) * | 2011-11-15 | 2012-06-13 | 厦门柏润氟材料科技有限公司 | Microwave sintering and drafting device for pasty polytetrafluoroethylene extruded fibers |
| CN105648556A (en) * | 2014-10-31 | 2016-06-08 | 陈路 | Drawing machine making PTFE sewing thread |
| CN105887215A (en) * | 2014-10-31 | 2016-08-24 | 陈路 | Process for manufacturing PTFE sewing thread through extrusion method |
| CN105887221A (en) * | 2014-10-31 | 2016-08-24 | 陈路 | Multi-roller drafting device for manufacturing PTFE sewing thread |
| CN106012062A (en) * | 2016-08-02 | 2016-10-12 | 苏州耐德新材料科技有限公司 | Continuous polytetrafluoroethylene filaments and production method thereof |
| CN107326501A (en) * | 2017-08-25 | 2017-11-07 | 苏州耐德新材料科技有限公司 | A kind of composite sewing thread of silk, yarn clad structure |
| CN110042525A (en) * | 2019-05-05 | 2019-07-23 | 苏州耐德新材料科技有限公司 | A kind of black-reinforced PTFE sewing thread and its preparation method |
| CN110055603A (en) * | 2019-04-24 | 2019-07-26 | 浙江绿净环保科技股份有限公司 | A kind of PTFE sewing thread and its preparation process |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5281475A (en) * | 1991-10-17 | 1994-01-25 | W. L. Gore & Associates, Inc. | Continuous polytetrafluoroethylene fibers |
| US5591526A (en) * | 1994-06-15 | 1997-01-07 | W. L. Gore & Associates, Inc | Expanded PTFE fiber and fabric and method of making same |
| AT408766B (en) * | 1996-10-11 | 2002-03-25 | Chemiefaser Lenzing Ag | LOW-FIBRILLATION SHAPED BODY |
-
2006
- 2006-12-07 CN CNB2006101550536A patent/CN100494532C/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102051723A (en) * | 2009-10-28 | 2011-05-11 | 上海金由氟材料有限公司 | Coupling wire of FRP (Fiber Reinforced Plastics) and PTFE (Polytetrafluoroethylene) fiber |
| 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 |
| CN101962839A (en) * | 2010-09-10 | 2011-02-02 | 常州市兴诚高分子材料有限公司 | Process for producing polytetrafluoroethylene yarn for enhancing fabrics |
| CN102102232B (en) * | 2010-11-22 | 2012-07-25 | 宋朋泽 | Method for preparing polytetrafluoroethylene fiber in drawing manner |
| CN102102232A (en) * | 2010-11-22 | 2011-06-22 | 宋朋泽 | Method for preparing polytetrafluoroethylene fiber in drawing manner |
| CN102493007B (en) * | 2011-11-15 | 2014-01-29 | 厦门柏润氟材料科技有限公司 | Microwave sintering and drafting device for pasty polytetrafluoroethylene extruded fibers |
| CN102493007A (en) * | 2011-11-15 | 2012-06-13 | 厦门柏润氟材料科技有限公司 | Microwave sintering and drafting device for pasty polytetrafluoroethylene extruded fibers |
| CN105648556A (en) * | 2014-10-31 | 2016-06-08 | 陈路 | Drawing machine making PTFE sewing thread |
| CN105887215A (en) * | 2014-10-31 | 2016-08-24 | 陈路 | Process for manufacturing PTFE sewing thread through extrusion method |
| CN105887221A (en) * | 2014-10-31 | 2016-08-24 | 陈路 | Multi-roller drafting device for manufacturing PTFE sewing thread |
| CN106012062A (en) * | 2016-08-02 | 2016-10-12 | 苏州耐德新材料科技有限公司 | Continuous polytetrafluoroethylene filaments and production method thereof |
| CN107326501A (en) * | 2017-08-25 | 2017-11-07 | 苏州耐德新材料科技有限公司 | A kind of composite sewing thread of silk, yarn clad structure |
| CN110055603A (en) * | 2019-04-24 | 2019-07-26 | 浙江绿净环保科技股份有限公司 | A kind of PTFE sewing thread and its preparation process |
| CN110042525A (en) * | 2019-05-05 | 2019-07-23 | 苏州耐德新材料科技有限公司 | A kind of black-reinforced PTFE sewing thread and its preparation method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100494532C (en) | 2009-06-03 |
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