CN104606955A - Method for preparing polytetrafluoroethylene/polypropylene composite needle punched filter felt - Google Patents
Method for preparing polytetrafluoroethylene/polypropylene composite needle punched filter felt Download PDFInfo
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- CN104606955A CN104606955A CN201410857237.1A CN201410857237A CN104606955A CN 104606955 A CN104606955 A CN 104606955A CN 201410857237 A CN201410857237 A CN 201410857237A CN 104606955 A CN104606955 A CN 104606955A
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- filter felt
- polytetrafluoroethyl
- polypropylene composite
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- polypropylene
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Abstract
The invention relates to a method for preparing a polytetrafluoroethylene/polypropylene composite needle punched filter felt, which comprises the following steps: processing a polytetrafluoroethylene fiber and a polypropylene fiber with an anti-static agent respectively, then leaving to stand, mixing and relaxing to obtain a mixed fiber; grounding a carding machine and a lapping machine for discharge, feeding the mixed fiber into the carding machine, and then lapping by the lapping machine to form a mixed fiber mesh; pre-needling the mixed fiber mesh, then, carrying out main needling, hot shaping and performing treatment by adopting a constant current or constant voltage corona charging technology to obtain the finished product. The polytetrafluoroethylene/polypropylene composite needle punched filter felt prepared by the method has the characteristics of excellent physical and chemical performance, wear resistance, corroding resistance, excellent moisture resistance and hydrophobic property, non-sticking property, easy de-ashing capability, high filtering efficiency and accuracy, small resistance and long service life.
Description
Technical field
The invention belongs to the preparation field of air filting material, particularly a kind of preparation method of polytetrafluoroethyl/ne /ne polypropylene composite needled filter felt.
Background technology
Non-woven material is as important air filting material, high yield, low cost and there is unique filtration advantage: fiber disordered arrangements and complicated tridimensional network, grit and fiber is made to collide and it be separated from air-flow, thus raising filter efficiency, and the tridimensional network being suitable for filtering material can be designed.And the advantage of the deep processing process such as non-woven material is easy and other filtrate compounds, easily carries out kilting on a production line, folds, compression molding, progressively instead of traditional woven and knitting filtrate and be widely applied in all trades and professions, its consumption is increasing.
At present, non-woven material is used as the kind of filtering material to be had: acupuncture, water thorn, spunbond, melt-blown and SMS composite nonwoven material etc., the technique diversity of production makes it can be applied to different fields.The kind of filtrate mainly contains fiber filtering, composite filtering material, functional filter material etc., and wherein composite filtering material and functional filter material are the study hotspots of rising in recent years.
Wherein high-caliber air filting material is widely used in the Workplace of electronic product and medicine, the field of hospital and other purification of air, so require that filter efficiency is high, gas-flow resistance is little, and mechanical strength is large, meets the particular/special requirements such as waterproof fireproofing, nowadays general employing is superfine glass fiber, melt spray fibre web+electret process, Static Spinning fibre web and ePTFE film, and also have very large research space for directly using PTFE fiber to make fibre web.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of preparation method of polytetrafluoroethyl/ne /ne polypropylene composite needled filter felt, and filter felt of the present invention has good physical and chemical performance, and wearability is good, corrosion-resistant, moisture-resistant hydrophobicity is good, does not stick, easy cleaning, good filtration effect.
The preparation method of a kind of polytetrafluoroethyl/ne /ne polypropylene composite needled filter felt of the present invention, comprising:
(1) process polytetrafluoroethylene fibre, polypropylene fibre respectively with antistatic additive, then leave standstill, mixing shredding, obtains composite fibre;
(2) by carding machine and the electric discharge of lapping machine ground connection, be 15 DEG C-30 DEG C in temperature, humidity is under 60-90% condition, composite fibre is fed in carding machine, then lapping machine lapping, forms mixing fibre web;
(3) above-mentioned mixing fibre web is carried out pre-needling (pre-needling be to combing after fibre web carry out preliminary sizing and reinforce), then main acupuncture, thermal finalization process, process in level, obtains polytetrafluoroethyl/ne /ne polypropylene composite needled filter felt; Wherein depth of needling 6-12mm, needling density 500-1500 pin/cm
2.
In described step (1), antistatic additive is cation, anion, nonionic or amphoteric ion type antistatic additive.
Described antistatic additive is antistatic additive SN.
In described step (1), polytetrafluoroethylene fibre fineness is 1-10D, and length is at 38-76mm; Polypropylene fineness is at 0.5-5D, and length is at 38-76mm; The weight ratio of polytetrafluoroethylene fibre and polypropylene fibre is 20%-80%.
In described step (1), time of repose is 6-48h.
In described step (2), the grammes per square metre of mixing fibre web is at 200-500g/m
2.
In described step (3), thermal finalization treatment temperature is 80-150 DEG C, and the time is 2-30min.
Being treated in level in described step (3) adopts constant current or constant voltage corona charging technology to process.
The present invention adopts PTFE and PP mixing fibre web again through the production technology of pinprick reinforcement, because in acupuncture course, the PTFE fiber of meeting effects on surface carries out fibrillation, form finer PTFE fibrage, improve filtering accuracy, improve filter efficiency further again finally by electret process.Not yet find at present to adopt polytetrafluoroethylene (PTFE) and polypropylene fibre to be that filter felt produced by raw material, the present invention aims to provide the technique that a kind of polytetrafluoroethylene (PTFE) and polypropylene fibre are raw material composite needled filter felt.
beneficial effect
The manufacture craft of polytetrafluoroethylene fibre provided by the present invention and polypropylene fibre composite needled filter felt, through the long-term experiment of applicant, can produce polytetrafluoroethylene (PTFE) and polypropylene fibre composite needled filter felt, this filter felt has good physical and chemical performance, wearability is good, corrosion-resistant, and moisture-resistant hydrophobicity is good, do not stick, easy-to-clean ash, filter efficiency is good, and precision is high, resistance is little, long service life.
Detailed description of the invention
Below in conjunction with specific embodiment, set forth the present invention further.Should be understood that these embodiments are only not used in for illustration of the present invention to limit the scope of the invention.In addition should be understood that those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values fall within the application's appended claims limited range equally after the content of having read the present invention's instruction.
Embodiment 1
(1) the polytetrafluoroethylene fibre fineness selected is at 10D, length is at 76mm, polypropylene fineness is at 5D, length is at 76mm, composite fibre PTFE:PP=70%:20% is prepared by required mixing ratio, cationic antistatic agent SN is evenly sprayed on raw material, then leaves standstill 48 hours, fiber is carried out sufficient shredding mixing.
(2) by carding machine and the electric discharge of lapping machine abundant ground connection, can adopt copper wire line, an end is connected on machine, ins succession copper rod in one end, then by buried for copper rod in underground.
(3) carry out strict process to the place of production and processing, temperature controls at 30 DEG C, humid control 90%,
(4) combing and lapping are carried out to the fiber left standstill.Composite fibre is fed into carding machine, then through machine lapping lapping, form mixing fibre web, and the grammes per square metre controlling fibre web is at 500g/m
2.
(5) carry out acupuncture to fibre web, fibre web is introduced needing machine and carry out pre-needling, then main acupuncture, depth of needling controls at 6-12mm, and needling density controls at 500-1500 pin/cm
2; Pre-needling be to combing after fibre web carry out preliminary sizing and reinforce, main acupuncture, to the further fibrillation of polytetrafluoroethylene (PTFE), reinforces fibre web simultaneously, makes fibre web obtain certain intensity.
(6) thermal finalization process is carried out to fibre web, the temperature of thermal finalization at 150 DEG C, the time 4min of thermal finalization.
(7) sting felt finally also to need through process in level, constant current or constant voltage corona charging technology can be adopted.
Embodiment 2
(1) the polytetrafluoroethylene fibre fineness selected is at 1D, length is at 38mm, polypropylene fineness is at 0.5D, length is at 38mm, composite fibre PTFE:PP=40%:600% is prepared by required mixing ratio, cationic antistatic agent SN is evenly sprayed on raw material, then leaves standstill 6 hours, fiber is carried out sufficient shredding mixing.
(2) by carding machine and the electric discharge of lapping machine abundant ground connection, can adopt copper wire line, an end is connected on machine, ins succession copper rod in one end, then by buried for copper rod in underground.
(3) carry out strict process to the place of production and processing, temperature controls at 15 DEG C, humid control 65%,
(4) combing and lapping are carried out to the fiber left standstill.Composite fibre is fed into carding machine, then through machine lapping lapping, form mixing fibre web, and the grammes per square metre controlling fibre web is at 200g/m
2.
(5) carry out acupuncture to fibre web, fibre web is introduced needing machine and carry out pre-needling, then main acupuncture, depth of needling controls at 6-12mm, and needling density controls at 500-1500 pin/cm
2; Pre-needling be to combing after fibre web carry out preliminary sizing and reinforce, main acupuncture, to the further fibrillation of polytetrafluoroethylene (PTFE), reinforces fibre web simultaneously, makes fibre web obtain certain intensity.
(6) thermal finalization process is carried out to fibre web, the temperature of thermal finalization at 80 DEG C, the time 30min of thermal finalization
(7) sting felt finally also to need through process in level, constant current or constant voltage corona charging technology can be adopted.
Claims (9)
1. a preparation method for polytetrafluoroethyl/ne /ne polypropylene composite needled filter felt, comprising:
(1) process polytetrafluoroethylene fibre, polypropylene fibre respectively with antistatic additive, then leave standstill, mixing shredding, obtains composite fibre;
(2) by carding machine and the electric discharge of lapping machine ground connection, be 15 DEG C-30 DEG C in temperature, humidity is under 60-90% condition, composite fibre is fed in carding machine, then lapping machine lapping, forms mixing fibre web;
(3) above-mentioned mixing fibre web is carried out pre-needling, then main acupuncture, thermal finalization process, process in level, obtain polytetrafluoroethyl/ne /ne polypropylene composite needled filter felt.
2. the preparation method of a kind of polytetrafluoroethyl/ne /ne polypropylene composite needled filter felt according to claim 1, is characterized in that: in described step (1), antistatic additive is cation, anion, nonionic or amphoteric ion type antistatic additive.
3. the preparation method of a kind of polytetrafluoroethyl/ne /ne polypropylene composite needled filter felt according to claim 2, is characterized in that: described antistatic additive is antistatic additive SN.
4. the preparation method of a kind of polytetrafluoroethyl/ne /ne polypropylene composite needled filter felt according to claim 1, is characterized in that: in described step (1), polytetrafluoroethylene fibre fineness is 1-10D, and length is at 38-76mm; Polypropylene fineness is at 0.5-5D, and length is at 38-76mm; The weight ratio of polytetrafluoroethylene fibre and polypropylene fibre is 20%-80%.
5. the preparation method of a kind of polytetrafluoroethyl/ne /ne polypropylene composite needled filter felt according to claim 1, is characterized in that: in described step (1), time of repose is 6-48h.
6. the preparation method of a kind of polytetrafluoroethyl/ne /ne polypropylene composite needled filter felt according to claim 1, is characterized in that: in described step (2), the grammes per square metre of mixing fibre web is at 200-500g/m
2.
7. the preparation method of a kind of polytetrafluoroethyl/ne /ne polypropylene composite needled filter felt according to claim 1, is characterized in that: in described step (3), thermal finalization treatment temperature is 80-150 DEG C, and the time is 2-30min.
8. the preparation method of a kind of polytetrafluoroethyl/ne /ne polypropylene composite needled filter felt according to claim 1, is characterized in that: depth of needling 6-12mm, needling density 500-1500 pin/cm in described step (3)
2.
9. the preparation method of a kind of polytetrafluoroethyl/ne /ne polypropylene composite needled filter felt according to claim 1, is characterized in that: be treated in level in described step (3) and adopt constant current or constant voltage corona charging technology to process.
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| CN201410857237.1A CN104606955A (en) | 2014-12-30 | 2014-12-30 | Method for preparing polytetrafluoroethylene/polypropylene composite needle punched filter felt |
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| CN201410857237.1A CN104606955A (en) | 2014-12-30 | 2014-12-30 | Method for preparing polytetrafluoroethylene/polypropylene composite needle punched filter felt |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105854418A (en) * | 2016-05-11 | 2016-08-17 | 安徽元琛环保科技股份有限公司 | Electret filter material and production method thereof |
| CN106480604A (en) * | 2015-08-31 | 2017-03-08 | 山东天富非织造材料有限公司 | A kind of mask lining cloth and its manufacture method |
| CN106567189A (en) * | 2016-11-04 | 2017-04-19 | 东华大学 | Method for preparing high-performance PTFE fiber paper |
| CN107055644A (en) * | 2017-05-08 | 2017-08-18 | 吉林省华纺静电材料科技有限公司 | Purifier for running water complex filter element production technology |
| CN107754450A (en) * | 2017-11-20 | 2018-03-06 | 安徽元琛环保科技股份有限公司 | A kind of preparation method of the special electret filtrate of non-ferrous metal |
| CN109745774A (en) * | 2019-02-21 | 2019-05-14 | 江苏奥凯环境技术有限公司 | The production method of needled filtering felt suitable for asphalt mixing |
| CN109772028A (en) * | 2019-02-21 | 2019-05-21 | 江苏奥凯环境技术有限公司 | The production method of asphalt mixing needled filtering felt |
| CN111203054A (en) * | 2018-11-21 | 2020-05-29 | 上海精发实业股份有限公司 | Electrostatic filter material with flame retardant function and preparation method and application thereof |
| CN111334935A (en) * | 2018-12-19 | 2020-06-26 | 上海精发实业股份有限公司 | Spunbonded filament electrostatic framework filter material and preparation method and application thereof |
| CN111359316A (en) * | 2018-12-25 | 2020-07-03 | 上海精发实业股份有限公司 | Polyolefin spunbonded filament electrostatic framework filtering material with antibacterial and mildew-proof functions and preparation method and application thereof |
| CN111364164A (en) * | 2018-12-25 | 2020-07-03 | 上海精发实业股份有限公司 | Multifunctional self-reinforced bicomponent filament electrostatic filtering material and preparation method and application thereof |
| CN112726022A (en) * | 2021-01-07 | 2021-04-30 | 肇庆天乙非织造材料有限公司 | Preparation method of polypropylene-polyethylene composite non-woven fabric |
| CN114277505A (en) * | 2021-12-10 | 2022-04-05 | 东莞市利韬过滤材料有限公司 | Short fiber water electret electrostatic skeleton and its preparation process |
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Cited By (17)
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| CN106480604A (en) * | 2015-08-31 | 2017-03-08 | 山东天富非织造材料有限公司 | A kind of mask lining cloth and its manufacture method |
| CN106480604B (en) * | 2015-08-31 | 2019-04-23 | 山东天富非织造材料有限公司 | A kind of mask lining cloth and its manufacturing method |
| CN105854418A (en) * | 2016-05-11 | 2016-08-17 | 安徽元琛环保科技股份有限公司 | Electret filter material and production method thereof |
| CN106567189A (en) * | 2016-11-04 | 2017-04-19 | 东华大学 | Method for preparing high-performance PTFE fiber paper |
| CN107055644B (en) * | 2017-05-08 | 2020-04-21 | 吉林省华纺静电材料科技有限公司 | Production process of composite filter element of tap water purifier |
| CN107055644A (en) * | 2017-05-08 | 2017-08-18 | 吉林省华纺静电材料科技有限公司 | Purifier for running water complex filter element production technology |
| CN107754450A (en) * | 2017-11-20 | 2018-03-06 | 安徽元琛环保科技股份有限公司 | A kind of preparation method of the special electret filtrate of non-ferrous metal |
| CN111203054A (en) * | 2018-11-21 | 2020-05-29 | 上海精发实业股份有限公司 | Electrostatic filter material with flame retardant function and preparation method and application thereof |
| CN111203054B (en) * | 2018-11-21 | 2021-12-03 | 上海精发实业股份有限公司 | Electrostatic filter material with flame retardant function and preparation method and application thereof |
| CN111334935A (en) * | 2018-12-19 | 2020-06-26 | 上海精发实业股份有限公司 | Spunbonded filament electrostatic framework filter material and preparation method and application thereof |
| CN111359316A (en) * | 2018-12-25 | 2020-07-03 | 上海精发实业股份有限公司 | Polyolefin spunbonded filament electrostatic framework filtering material with antibacterial and mildew-proof functions and preparation method and application thereof |
| CN111364164A (en) * | 2018-12-25 | 2020-07-03 | 上海精发实业股份有限公司 | Multifunctional self-reinforced bicomponent filament electrostatic filtering material and preparation method and application thereof |
| CN111359316B (en) * | 2018-12-25 | 2021-12-03 | 上海精发实业股份有限公司 | Polyolefin spunbonded filament electrostatic framework filtering material with antibacterial and mildew-proof functions and preparation method and application thereof |
| CN109772028A (en) * | 2019-02-21 | 2019-05-21 | 江苏奥凯环境技术有限公司 | The production method of asphalt mixing needled filtering felt |
| CN109745774A (en) * | 2019-02-21 | 2019-05-14 | 江苏奥凯环境技术有限公司 | The production method of needled filtering felt suitable for asphalt mixing |
| CN112726022A (en) * | 2021-01-07 | 2021-04-30 | 肇庆天乙非织造材料有限公司 | Preparation method of polypropylene-polyethylene composite non-woven fabric |
| CN114277505A (en) * | 2021-12-10 | 2022-04-05 | 东莞市利韬过滤材料有限公司 | Short fiber water electret electrostatic skeleton and its preparation process |
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