CN104998469A - Preparation method for teflon membrane-coated filtering material - Google Patents
Preparation method for teflon membrane-coated filtering material Download PDFInfo
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- CN104998469A CN104998469A CN201510355401.3A CN201510355401A CN104998469A CN 104998469 A CN104998469 A CN 104998469A CN 201510355401 A CN201510355401 A CN 201510355401A CN 104998469 A CN104998469 A CN 104998469A
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Abstract
The invention provides a preparation method for a teflon membrane-coated filtering material. The preparation method comprises the following steps: separately pretreating a teflon membrane and a terylene spunbonded non-woven fabric; compounding the pretreated teflon membrane and the pretreated terylene spunbonded non-woven fabric so as to obtain a teflon membrane-coated filtering material precursor; and subjecting the teflon membrane-coated filtering material precursor to heat setting so as to obtain the teflon membrane-coated filtering material. A pretreatment method for the teflon microporous membrane comprises a first step of preheating the teflon microporous membrane and a second step of removing static electricity on the surface of the teflon microporous membrane. The invention has the following advantages: the terylene filter material prepared through hot pressing and compounding realizes surface filtering and has improved filtering efficiency, dynamically reaching 99.9995%, which is close to zero discharge; and the membrane-coated filtering material produced by using hot pressing and compounding technology can realize high-efficiency, low-resistance and long-life effect.
Description
Technical field
The present invention relates to a kind of preparation method of industrial filter material, particularly a kind of F preparation method.
Background technology
As a kind of cleaner of high efficiency of dust collection, the development prospect of sack cleaner is generally had an optimistic view of.Under the macroscopic that China " 12 " reduces discharging, sack cleaner industry has welcome new business opportunity.Insider analyzes, and bag-type dusting is high due to efficiency of dust collection, can not cause secondary pollution, is convenient to reclaim the performances such as siccative, and application is at home and abroad more and more wider.Filtrate is sack cleaner " heart ", occupies 20 ~ 40% of whole sack cleaner cost.In recent years, along with the development of bag type dust removing technology and industry, dedusting filtrate, especially high-performance filtrate has wide market development prospect.
Be covered with one deck microporous teflon membran on spun-bonded non-woven fabrics surface and not only can improve its precision, its hydrophily (or hydrophobicity) can be increased again.Wherein non-weaving cloth filter material both can be used as skeleton increases its filter material intensity and deflection, can be used as coarse filtration again, retains coarse granule.Utilize different fineness fiber to fold the non-weaving cloth being spun into different pore size, can be made into depth-type filtration material, to improve the service time of filter material.
But, existing conventional terylene/PTFE membrane filter material preparation method is by adhesion process (CN101362035A) or Sintering Method (CN 201889128 U) at present, but no matter be adhesion process or Sintering Method, last coated filter material is all because the space of microporous teflon membran is blocked by adhesive or sinters the factors such as blocking and obviously reduce, final impact, the filter efficiency of filtrate.
Our company develops a kind of novel terylene/PTFE membrane filter material manufacturing process in conjunction with the PTFE film of our company and fibre manufacturing technique on traditional sack cleaner filtrate basis, namely the biaxial tension PTFE film adopting our company to produce, makes filtrate through pretreating process in terylene spun-bonded non-woven fabrics hot pressing compound.The method produces PTFE filtrate, and have technological process short, simple to operate, cost is lower, is also easy to the features such as large-scale production.
Summary of the invention
For defect of the prior art, the object of this invention is to provide a kind of preparation method of F.
The present invention is achieved by the following technical solutions:
The invention provides a kind of preparation method of F, it comprises the steps:
Respectively pretreatment is carried out to poly tetrafluoroethylene and terylene spun-bonded non-woven fabrics;
By pretreated poly tetrafluoroethylene and terylene spun-bonded non-woven fabrics under 0.03 ~ 4.9MPa pressure, carry out compound in 150 ~ 430 DEG C, obtain F presoma;
Described F presoma is carried out thermal finalization process at 90 DEG C ~ 250 DEG C, obtains F;
Wherein, the preprocess method of described microporous teflon membran is: after microporous teflon membran is carried out preheating at 65 DEG C ~ 105 DEG C, removes the electrostatic on microporous teflon membran surface; Described terylene spun-bonded non-woven fabrics carries out pretreated method for carry out calcination process at 250 DEG C ~ 500 DEG C to its surface.
Preferably, the method that what described microporous teflon membran destaticed is by blowing ion wind, the air quantity of described ion wind is 45 ~ 360cfm.
Preferably, the method for described terylene spun-bonded non-woven fabrics increasing specific surface area is 480 DEG C of calcinations.
Preferably, in described composite steps, the rotating speed controlling composite roll is 0.8m/min.
Preferably, in described thermal finalization process, setting roller rotating speed is 0.05min/min.
The present invention develops a kind of novel terylene/PTFE membrane filter material manufacturing process in conjunction with the PTFE film of our company and fibre manufacturing technique on traditional sack cleaner filtrate basis, namely adopt the biaxial tension PTFE film of this production, make filtrate through pretreating process in terylene spun-bonded non-woven fabrics hot pressing compound.The method produces PTFE filtrate, and have technological process short, simple to operate, cost is lower, is also easy to the features such as large-scale production.
Compared with prior art, the present invention has following beneficial effect:
Adopt after technique scheme, what the production technology of PTFE hot melt overlay film terylene paper adopted is hot pressing cladding technology, microporous barrier and terylene non-woven fabric is carried out hot melt by hot melt composite roll laminating.The coated filter material produced due to hot-pressing technique does not have the third material between microporous barrier and terylene non-woven fabric, does not have a series of problem that in former gluing laminating technology, between microporous barrier and terylene non-woven fabric, adhesive causes.The terylene filtrate that hot pressing cladding is made achieves surface filtration, and filter efficiency improves, and dynamically can reach 99.9995%, and close to zero-emission, the coated filter material using hot pressing cladding technology to produce can realize efficiently, low-resistance and long-life effect.
Can reach more than 99.95 ~ 99.9995% to the dust filtration efficiency of MPPS, ultimate strength >=850 (N/5cm), elongation at break < 35%, Air permenbility is 3 ~ 4 [m3/ (m2.min), 127Pa].
Accompanying drawing explanation
By reading the detailed description done non-limiting example with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:
Fig. 1 is process chart of the present invention.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in detail.Following examples will contribute to those skilled in the art and understand the present invention further, but not limit the present invention in any form.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, some distortion and improvement can also be made.These all belong to protection scope of the present invention.
The aperture of microporous teflon membran selected in the present invention between 0.08 ~ 2.5 μm, fabric width 0.8 ~ 2.75m, thickness at 2 ~ 9 μm, porosity: 65 ~ 85%, hot strength: >=20MPa;
Selected terylene non-woven fabric is the terylene spun-bonded non-woven fabrics of commercially available traditional filter material.
embodiment 1
The present embodiment relates to the technological process of a kind of preparation method of F as shown in Figure 1, comprises the steps:
1, by microporous teflon membran to preheat in baking oven 105 DEG C carry out preheating 15min after, with ion blower, with the ion air quantity process 15min of 125 (cfm), the electrostatic on removing microporous teflon membran surface; The surface of terylene spun-bonded non-woven fabrics is carried out the calcination process at 250 DEG C simultaneously, improve the specific area of non-woven fabrics;
2, pretreated for above-mentioned steps microporous teflon membran and terylene spun-bonded nonwoven are distributed in compound baking oven, under the pressure of 0.05MPa, carry out compound with the composite roll rotating speed of the temperature of 250 DEG C, 0.8m/min, obtain F presoma;
3, by described F presoma at 65 DEG C, with the setting roller rotating speed of 0.05m/min, carry out thermal finalization process, obtain F;
4, described F is carried out trimming rolling, and be packaged into finished product.
embodiment 2
The present embodiment relates to the technological process of a kind of preparation method of F as shown in Figure 1, comprises the steps:
1, by microporous teflon membran to preheat in baking oven 65 DEG C carry out preheating 30min after, with ion blower, with the ion air quantity process 30min of 45 (cfm), the electrostatic on removing microporous teflon membran surface; The surface of terylene spun-bonded non-woven fabrics is carried out the calcination process at 500 DEG C simultaneously, improve the specific area of non-woven fabrics;
2, pretreated for above-mentioned steps microporous teflon membran and terylene spun-bonded nonwoven are distributed in compound baking oven, under the pressure of 0.05MPa, carry out compound with the composite roll rotating speed of the temperature of 200 DEG C, 0.8m/min, obtain F presoma;
3, by described F presoma at 100 DEG C, with the setting roller rotating speed of 0.05m/min, carry out thermal finalization process, obtain F;
4, described F is carried out trimming rolling, and be packaged into finished product.
embodiment 3
The present embodiment relates to the technological process of a kind of preparation method of F as shown in Figure 1, comprises the steps:
1, by microporous teflon membran to preheat in baking oven 80 DEG C carry out preheating 20min after, with ion blower, with the ion air quantity process 5min of 360 (cfm), the electrostatic on removing microporous teflon membran surface; The surface of terylene spun-bonded non-woven fabrics is carried out the calcination process at 480 DEG C simultaneously, improve the specific area of non-woven fabrics;
2, pretreated for above-mentioned steps microporous teflon membran and terylene spun-bonded nonwoven are distributed in compound baking oven, under the pressure of 0.05MPa, carry out compound with the composite roll rotating speed of the temperature of 150 DEG C, 0.8m/min, obtain F presoma;
3, by described F presoma at 105 DEG C, with the setting roller rotating speed of 0.05m/min, carry out thermal finalization process, obtain F;
4, described F is carried out trimming rolling, and be packaged into finished product.
embodiment 4
The present embodiment relates to the technological process of a kind of preparation method of F as shown in Figure 1, comprises the steps:
1, by microporous teflon membran to preheat in baking oven 80 DEG C carry out preheating 20min after, with ion blower, with the ion air quantity process 5min of 360 (cfm), the electrostatic on removing microporous teflon membran surface; The surface of terylene spun-bonded non-woven fabrics is carried out the calcination process at 480 DEG C simultaneously, improve the specific area of non-woven fabrics;
2, pretreated for above-mentioned steps microporous teflon membran and terylene spun-bonded nonwoven are distributed in compound baking oven, under the pressure of 4.9MPa, carry out compound with the composite roll rotating speed of the temperature of 400 DEG C, 0.8m/min, obtain F presoma;
3, by described F presoma at 80 DEG C, with the setting roller rotating speed of 0.05m/min, carry out thermal finalization process, obtain F;
4, described F is carried out trimming rolling, and be packaged into finished product.
embodiment 5
The present embodiment relates to the technological process of a kind of preparation method of F as shown in Figure 1, comprises the steps:
1, by microporous teflon membran to preheat in baking oven 80 DEG C carry out preheating 20min after, with ion blower, with the ion air quantity process 5min of 360 (cfm), the electrostatic on removing microporous teflon membran surface; The surface of terylene spun-bonded non-woven fabrics is carried out the calcination process at 480 DEG C simultaneously, improve the specific area of non-woven fabrics;
2, pretreated for above-mentioned steps microporous teflon membran and terylene spun-bonded nonwoven are distributed in compound baking oven, under the pressure of 0.05MPa, carry out compound with the composite roll rotating speed of the temperature of 430 DEG C, 0.8m/min, obtain F presoma;
3, by described F presoma at 90 DEG C, with the setting roller rotating speed of 0.05m/min, carry out thermal finalization process, obtain F;
4, described F is carried out trimming rolling, and be packaged into finished product.
Above specific embodiments of the invention are described.It is to be appreciated that the present invention is not limited to above-mentioned particular implementation, those skilled in the art can make various distortion or amendment within the scope of the claims, and this does not affect flesh and blood of the present invention.
Claims (5)
1. a preparation method for F, is characterized in that, comprises the steps:
Respectively pretreatment is carried out to poly tetrafluoroethylene and terylene spun-bonded non-woven fabrics;
By pretreated poly tetrafluoroethylene and terylene spun-bonded non-woven fabrics under 0.03 ~ 4.9MPa pressure, carry out compound in 150 ~ 430 DEG C, obtain F presoma;
Described F presoma is carried out thermal finalization process at 90 ~ 250 DEG C, obtains F;
Wherein, the preprocess method of described microporous teflon membran is: after microporous teflon membran is carried out preheating at 65 ~ 105 DEG C, removes the electrostatic on microporous teflon membran surface; It is Flame-burned that described terylene spun-bonded non-woven fabrics carries out pretreated method.
2. preparation method as claimed in claim 1, is characterized in that, it is method by blowing ion wind that described microporous teflon membran destatics, and the air quantity of described ion wind is 45 ~ 360cfm.
3. preparation method as claimed in claim 1, it is characterized in that, the calcination temperature of described Flame-burned is 250 ~ 500 DEG C.
4. preparation method as claimed in claim 1, is characterized in that, in described composite steps, the rotating speed controlling composite roll is 0.1 ~ 10m/min.
5. preparation method as claimed in claim 1, it is characterized in that, in described thermal finalization process, setting roller rotating speed is 0.01 ~ 10.0min/min.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105536353A (en) * | 2015-07-20 | 2016-05-04 | 秦诗发 | 3D plastic-coated antistatic flame retardation gas-liquid filter cloth |
| CN107019958A (en) * | 2016-02-02 | 2017-08-08 | 东丽纤维研究所（中国）有限公司 | A kind of conducting filtration material and its production method |
| CN107379680A (en) * | 2017-07-21 | 2017-11-24 | 江苏明晶布业股份有限公司 | A kind of glass composite felt overlay film filter material |
| CN107376671A (en) * | 2017-08-23 | 2017-11-24 | 谢东明 | Filtering material based on poly tetrafluoroethylene and its preparation method and application |
| CN108465298A (en) * | 2018-03-02 | 2018-08-31 | 东华大学 | A kind of fluorine resin dusting coating high-temp flue filtering material and preparation method thereof |
| CN108819426A (en) * | 2018-07-05 | 2018-11-16 | 爱美克空气过滤器（苏州）有限公司 | A kind of polytetrafluoroethylfilter filter material set composite and preparation method thereof |
| CN112252047A (en) * | 2020-09-18 | 2021-01-22 | 杨道光 | Electrostatic filter cotton with improved performance, and preparation method and application thereof |
| WO2021189761A1 (en) | 2020-03-24 | 2021-09-30 | 中昊晨光化工研究院有限公司 | Polytetrafluoroethylene composite filter material, and preparation method therefor and application thereof |
-
2015
- 2015-06-24 CN CN201510355401.3A patent/CN104998469A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105536353A (en) * | 2015-07-20 | 2016-05-04 | 秦诗发 | 3D plastic-coated antistatic flame retardation gas-liquid filter cloth |
| CN107019958A (en) * | 2016-02-02 | 2017-08-08 | 东丽纤维研究所（中国）有限公司 | A kind of conducting filtration material and its production method |
| CN107379680A (en) * | 2017-07-21 | 2017-11-24 | 江苏明晶布业股份有限公司 | A kind of glass composite felt overlay film filter material |
| CN107379680B (en) * | 2017-07-21 | 2019-11-12 | 江苏明晶布业股份有限公司 | A kind of glass composite felt overlay film filter material |
| CN107376671A (en) * | 2017-08-23 | 2017-11-24 | 谢东明 | Filtering material based on poly tetrafluoroethylene and its preparation method and application |
| CN108465298A (en) * | 2018-03-02 | 2018-08-31 | 东华大学 | A kind of fluorine resin dusting coating high-temp flue filtering material and preparation method thereof |
| CN108465298B (en) * | 2018-03-02 | 2020-11-10 | 东华大学 | Fluorine-containing resin dusting coating high-temperature flue gas filtering material and preparation method thereof |
| CN108819426A (en) * | 2018-07-05 | 2018-11-16 | 爱美克空气过滤器（苏州）有限公司 | A kind of polytetrafluoroethylfilter filter material set composite and preparation method thereof |
| WO2021189761A1 (en) | 2020-03-24 | 2021-09-30 | 中昊晨光化工研究院有限公司 | Polytetrafluoroethylene composite filter material, and preparation method therefor and application thereof |
| CN112252047A (en) * | 2020-09-18 | 2021-01-22 | 杨道光 | Electrostatic filter cotton with improved performance, and preparation method and application thereof |
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Application publication date: 20151028 |