CN103877785A - Modification treatment method for non-thermoplastic chemical fiber filtration material before film covering - Google Patents
Modification treatment method for non-thermoplastic chemical fiber filtration material before film covering Download PDFInfo
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- CN103877785A CN103877785A CN201210565133.4A CN201210565133A CN103877785A CN 103877785 A CN103877785 A CN 103877785A CN 201210565133 A CN201210565133 A CN 201210565133A CN 103877785 A CN103877785 A CN 103877785A
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Abstract
The present invention discloses a modification treatment method for a non-thermoplastic chemical fiber filtration material before film covering. The modification treatment method comprises modification preparation and dipping or spray-coating treatment, and specifically comprises: uniformly stirring a PTFE dispersion, a stabilizer, a penetrating agent and water according to a certain ratio to obtain a non-thermoplastic chemical fiber filtration material before-film-covering modification agent; and permeating the modification agent into the surface layer of a filtration material through dipping or spray-coating equipment, drying, carrying out high temperature sintering to finally form a uniformly-dispersed PTFE particle dispersing layer on the surface layer of the filtration material so as to complete the modification treatment of the non-thermoplastic chemical fiber filtration material before film covering. After the non-thermoplastic chemical fiber filtration material treated by the method is subjected to a thermal covering method, the film covering filtration material with qualified fastness, qualified air permeability and qualified thickness can be prepared, and can be widely applied in cement, steel, metallurgy, chemical industry and other industries.
Description
Technical field
Deduster corollary apparatus of the present invention field, refers to the modification processing method before a kind of non-thermal plasticity chemical fibre filtrate overlay film especially.
Background technology
Along with the requirement of environmental protection is more and more higher; general acupuncture felt filter material can not meet more and more stricter industrial tail gas discharge standard completely; particularly government and street levels is more and more paid close attention to the discharge of PM2.5 dust in recent years, causes increasing enterprise to adopt and have the more coated filter material of high filtering precision processing industrial tail gas.But on market, non-thermal plasticity chemical fibre coated filter material is all to adopt the method that glue covers to produce; apply last layer adhesive on base material top layer; again by PTFE(polytetrafluoroethylene (PTFE)) film adheres to up; due to generally lower (≤150 DEG C) of serviceability temperature of adhesive; and coated filter material requires to use more than 200 DEG C; so the non-thermal plasticity chemical fibre coated filter material that this glue covers in use often there will be the situation of demoulding, and cause coated filter material to lose efficacy.
Now generally adopt the method for hot compress to produce coated filter material, the method reaches to polyester (PET), polypropylene (PP), polyphenylene sulfide (PPS) etc. the thermoplastic fibre that fusing point melts, do not need to carry out pre-treatment, just can directly carry out thermal-adhering.But for inclined to one side aromatic polyamides (Aramid), partially aromatic polyimide (PI), polyacrylonitrile (AC/DT) etc. do not melt, also without the non-thermoplastic fiber of fusing point, can not directly carry out thermal-adhering.
As everyone knows, PTFE is the macromolecule organic material that a kind of chemical inertness is very strong, and by common binding agent and the non-thermoplastic fiber's filtrate PTFE membrane filter material making that bonds, its fastness is inadequate, is easy to occur demoulding, splits the quality problems such as film.
Summary of the invention
The object of this invention is to provide the modification processing method before a kind of non-thermal plasticity chemical fibre filtrate overlay film, make non-thermoplastic fiber's filtrate carry out thermal-adhering with PTFE film, improve firmness and the quality of non-thermoplastic fiber's coated filter material.
For achieving the above object, solution of the present invention is:
A modification processing method before non-thermal plasticity chemical fibre filtrate overlay film, its concrete steps are:
Step 1, configuration PTFE modifier: count by weight percentage, wherein PTFE dispersion liquid accounts for 30～70%, stabilizing agent 5 ~ 10%, bleeding agent 5 ~ 10%, surplus is water, stirs and is placed in reservoir;
Step 2, again by modifier by dipping or spraying equipment, modifier is infiltrated to non-thermal plasticity chemical fibre filtrate top layer, then through oven dry and high temperature sintering;
Step 3, filtrate top layer after sintering form equally distributed PTFE particle dispersion layer, have so just completed the modification before non-thermal plasticity chemical fibre filtrate overlay film.
In described step 1, the PTFE particle diameter of PTFE dispersion liquid is distributed as 0.1 ~ 0.4 μ m, wherein PTFE molecular weight >=1W, and solid constituent mass fraction >=50%, pH value is 6 ~ 8; Bleeding agent is the calcium stearate of white powder, active ingredient >=60%.
In described step 1, the PTFE particle diameter of PTFE dispersion liquid is distributed as 0.1 ~ 0.4 μ m, wherein PTFE molecular weight >=1W, and solid constituent mass fraction >=50%, pH value is 6 ~ 8; Bleeding agent is the dodecyl sodium sulfate of white or yellow powder powder, wherein active ingredient >=40%.
Described step 2 adopts impregnating equipment, and its line speed is 5 ~ 7m/min, and controlling pick-up is 150 ~ 200%.
Described step 2 adopts spraying equipment, is to carry out double-face spray painting, and the quantity for spray of each is 40 ~ 80g/min, and line speed is 6 ~ 10m/min.
In described step 3, be that the non-thermal plasticity filtrate after modification is placed at the temperature of 180 DEG C～210 DEG C, dry through 10 ~ 15 minutes, then be placed at the temperature of 210 DEG C～250 DEG C, cure through 5 ~ 10 minutes, make filtrate weightening finish 50～100g/m
2, non-thermoplastic fiber's filtrate top layer has formed resistant to elevated temperatures polytetrafluoroethylene (PTFE) dispersion layer.
Step 4 after described step 3 is by laminating machine, controls temperature the temperature of 300 DEG C ~ 380 DEG C, and pressure is 0.1～0.5MPa, and the speed of a motor vehicle is 10～15m/min, and the hot pressing of carrying out non-thermoplastic fiber's filtrate and polytetrafluoroethylene (PTFE) porous membranes is compound.
Adopt after such scheme, the present invention by special modifier dipping or spray treatment after, between non-thermoplastic fiber's filtrate top layer and polytetrafluoroethylene (PTFE) porous membranes, form the modified layer of one deck polytetrafluoroethylene (PTFE), again by high temperature hot pressing technique, make rear finish layer and polytetrafluoroethylene (PTFE) porous membranes that melting laminating occur under high temperature hot pressing condition, so just formed the novel fire resistant coated filter material that a kind of fastness is high.
Detailed description of the invention
Further introduce the present invention below by specific embodiment, but embodiment does not limit the scope of the invention.Should be understood that these embodiment are only not used in and limit the scope of the invention for the present invention is described.In addition should be understood that those skilled in the art can make various changes or amendment to the present invention after having read the content of the present invention's instruction, these equivalent form of values fall within the application's appended claims limited range equally.
The present invention has disclosed the modification processing method before a kind of non-thermal plasticity chemical fibre filtrate overlay film, and its concrete steps are:
Step 1, configure polytetrafluoroethylmodified modified dose: count by weight percentage, wherein polytetrafluoroethyldispersion dispersion accounts for 30～70%, stabilizing agent 5 ~ 10%, bleeding agent 5 ~ 10%, surplus is water, stirs and is placed in reservoir; Wherein the PTFE particle diameter of PTFE dispersion liquid is distributed as 0.1 ~ 0.4 μ m, wherein PTFE molecular weight >=1W, and solid constituent mass fraction >=50%, pH value is 6 ~ 8; Bleeding agent is the calcium stearate of white powder, has another name called stearic acid calcium salt, and active ingredient >=60% or bleeding agent are the dodecyl sodium sulfate of white or yellow powder powder, wherein active ingredient >=40%.
Step 2, again by modifier by dipping or spraying equipment, modifier is infiltrated to non-thermal plasticity chemical fibre filtrate top layer, then through oven dry and high temperature sintering;
If employing impregnating equipment, its line speed is 5 ~ 7m/min, and controlling pick-up is 150 ~ 200%.
If employing spraying equipment, is to carry out double-face spray painting, the quantity for spray of each is 40 ~ 80g/min, and line speed is 6 ~ 10m/min.
Step 3, filtrate top layer after sintering form equally distributed polytetrafluoroethylgranule granule dispersion layer, so just complete the modification before non-thermal plasticity chemical fibre filtrate overlay film, specifically the non-thermal plasticity filtrate after modification is placed at the temperature of 180 DEG C～210 DEG C, dried through 10 ~ 15 minutes, be placed in again at the temperature of 210 DEG C～250 DEG C, cure through 5 ~ 10 minutes, make filtrate weightening finish 50～100g/m
2, non-thermoplastic fiber's filtrate top layer has formed resistant to elevated temperatures polytetrafluoroethylene (PTFE) dispersion layer.
Step 4, by laminating machine, control temperature the temperature of 300 DEG C ~ 380 DEG C, pressure is 0.1～0.5MPa, the speed of a motor vehicle is 10～15m/min, the hot pressing of carrying out non-thermoplastic fiber's filtrate and polytetrafluoroethylene (PTFE) porous membranes is compound.
The non-thermal plasticity chemical fibre coated filter material of producing under these conditions, Performance Detection index and application index, see the following form:
Table 1 non-thermal plasticity chemical fibre coated filter material Performance Detection index and application index
| Project | Unit | Performance indications |
| Air permenbility | L/dm 2.min | 20~50 |
| Cover and fastness | MPa | ≥0.1 |
| Maximum filtering wind speed | m/min | 0.6~1.0 |
| Filter efficiency | % | 99.99 |
| Outlet concentration of emission | mg/Nm 3 | ≤10 |
| Running resistance | Pa | ≤1200 |
Embodiment mono-: aromatic polyamides coated filter material partially
The modifier of 1.1 configuration polytetrafluoroethylene (PTFE) dippings or spraying: add successively various auxiliary agents according to following formula, and continue to stir 20 ~ 30 minutes, for subsequent use
| Auxiliary agent title | Weight ratio % |
| PTFE dispersion liquid | 40 |
| Stabilizing agent | 6 |
| Infiltrate agent | 8 |
| Water | 46 |
Inclined to one side aromatic polyamides filtrate is carried out impregnation process by 1.2, and pick-up is controlled at 130%.
1.3 are placed in the inclined to one side aromatic polyamides filtrate after dipping at the temperature of 190 DEG C again, dry through 15 ~ 30 minutes, then are placed at the temperature of 240 DEG C, cure through 5 ~ 10 minutes.
1.4 temperature that set laminating machine are 320 DEG C, and pressure is 0.1MPa, and line speed is 12m/min, and the inclined to one side aromatic polyamides filtrate curing is passed through to laminating machine together with polytetrafluoroethylene (PTFE) porous membranes.Can make inclined to one side aromatic polyamides coated filter material.
The performance indications of aromatic polyamides coated filter material partially
| Project | Unit | Performance indications |
| Air permenbility | L/dm 2.min | 25 |
| Cover and fastness | MPa | 0.13 |
| Filter efficiency | % | 99.995 |
| Outlet concentration of emission | mg/Nm 3 | 0.54 |
| Running resistance | Pa | ≤1100 |
Embodiment bis-: aromatic polyimide coated filter material partially
The modifier of 2.1 configuration polytetrafluoroethylene (PTFE) dippings or spraying: add successively various auxiliary agents according to following formula, and continue to stir 20 ~ 30 minutes, for subsequent use
| Auxiliary agent title | Weight ratio % |
| PTFE dispersion liquid | 70 |
| Stabilizing agent | 8 |
| Infiltrate agent | 8 |
| Water | 14 |
2.2 speed that spray of setting flush coater are 50g/min, and line speed is 7m/min, double-face spray painting.
2.3 are placed in the inclined to one side aromatic polyimide filtrate after modification at the temperature of 210 DEG C again, dry through 15 ~ 30 minutes, then are placed at the temperature of 250 DEG C, cure through 10 ~ 15 minutes.
2.4 temperature that set laminating machine are 360 DEG C, and pressure is 0.4MPa, and line speed is 15m/min, and the inclined to one side aromatic polyimide filtrate curing is passed through to laminating machine together with polytetrafluoroethylene (PTFE) porous membranes.Can make inclined to one side aromatic polyimide coated filter material.
The performance indications of aromatic polyimide coated filter material partially
| Project | Unit | Performance indications |
| Air permenbility | L/dm 2.min | 30 |
| Cover and fastness | MPa | 0.11 |
| Filter efficiency | % | 99.998 |
| Outlet concentration of emission | mg/Nm 3 | 0.41 |
| Running resistance | Pa | ≤1080 |
Claims (7)
1. the modification processing method before non-thermal plasticity chemical fibre filtrate overlay film, its concrete steps are:
Step 1, configuration PTFE modifier: count by weight percentage, wherein PTFE dispersion liquid accounts for 30～70%, stabilizing agent 5 ~ 10%, bleeding agent 5 ~ 10%, surplus is water, stirs and is placed in reservoir;
Step 2, again by modifier by dipping or spraying equipment, modifier is infiltrated to non-thermal plasticity chemical fibre filtrate top layer, then through oven dry and high temperature sintering;
Step 3, filtrate top layer after sintering form equally distributed PTFE particle dispersion layer, have so just completed the modification before non-thermal plasticity chemical fibre filtrate overlay film.
2. the modification processing method before non-thermal plasticity chemical fibre filtrate overlay film as claimed in claim 1, it is characterized in that: in described step 1, the PTFE particle diameter of PTFE dispersion liquid is distributed as 0.1 ~ 0.4 μ m, wherein PTFE molecular weight >=1W, solid constituent mass fraction >=50%, pH value is 6 ~ 8; Bleeding agent is the calcium stearate of white powder, active ingredient >=60%.
3. the modification processing method before non-thermal plasticity chemical fibre filtrate overlay film as claimed in claim 1, it is characterized in that: in described step 1, the PTFE particle diameter of PTFE dispersion liquid is distributed as 0.1 ~ 0.4 μ m, wherein PTFE molecular weight >=1W, solid constituent mass fraction >=50%, pH value is 6 ~ 8; Bleeding agent is the dodecyl sodium sulfate of white or yellow powder powder, wherein active ingredient >=40%.
4. the modification processing method before the non-thermal plasticity chemical fibre filtrate overlay film as described in claim 1,2 or 3, is characterized in that: described step 2 adopts impregnating equipment, and its line speed is 5 ~ 7m/min, and controlling pick-up is 150 ~ 200%.
5. the modification processing method before the non-thermal plasticity chemical fibre filtrate overlay film as described in claim 1,2 or 3, it is characterized in that: described step 2 adopts spraying equipment, be to carry out double-face spray painting, the quantity for spray of each is 40 ~ 80g/min, and line speed is 6 ~ 10m/min.
6. the modification processing method before the non-thermal plasticity chemical fibre filtrate overlay film as described in claim 1,2 or 3, it is characterized in that: in described step 3, be that the non-thermal plasticity filtrate after modification is placed at the temperature of 180 DEG C～210 DEG C, dried through 10 ~ 15 minutes, be placed in again at the temperature of 210 DEG C～250 DEG C, cure through 5 ~ 10 minutes, make filtrate weightening finish 50～100g/m
2, non-thermoplastic fiber's filtrate top layer has formed resistant to elevated temperatures polytetrafluoroethylene (PTFE) dispersion layer.
7. the modification processing method before the non-thermal plasticity chemical fibre filtrate overlay film as described in claim 1,2 or 3, it is characterized in that: the step 4 after described step 3 is to pass through laminating machine, control temperature the temperature of 300 DEG C ~ 380 DEG C, pressure is 0.1～0.5MPa, the speed of a motor vehicle is 10～15m/min, and the hot pressing of carrying out non-thermoplastic fiber's filtrate and polytetrafluoroethylene (PTFE) porous membranes is compound.
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Cited By (5)
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| CN105749621A (en) * | 2016-04-19 | 2016-07-13 | 上海净华环保科技有限公司 | Filter felt film-forming polytetrafluoroethylene PTFE-B dispersion treating process |
| CN105970517A (en) * | 2016-06-21 | 2016-09-28 | 安徽元琛环保科技股份有限公司 | Finishing method for fine spraying filter material and application |
| CN109647063A (en) * | 2018-12-24 | 2019-04-19 | 徐州赛孚瑞科高分子材料有限公司 | A kind of preparation method of the fiber film-coated filtrate of refractory metal |
| CN112715539A (en) * | 2021-01-28 | 2021-04-30 | 菲吉乐科(南京)生物科技有限公司 | Auxiliary penetrating agent suitable for bacteriophage to penetrate into tuber crops and preparation method and application thereof |
| CN113040140A (en) * | 2021-01-28 | 2021-06-29 | 菲吉乐科(南京)生物科技有限公司 | Auxiliary penetrating agent suitable for bacteriophage to be immersed into lianas and woody plants and preparation method and application thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105749621A (en) * | 2016-04-19 | 2016-07-13 | 上海净华环保科技有限公司 | Filter felt film-forming polytetrafluoroethylene PTFE-B dispersion treating process |
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| CN109647063A (en) * | 2018-12-24 | 2019-04-19 | 徐州赛孚瑞科高分子材料有限公司 | A kind of preparation method of the fiber film-coated filtrate of refractory metal |
| CN109647063B (en) * | 2018-12-24 | 2021-08-24 | 徐州赛孚瑞科高分子材料有限公司 | Preparation method of high-temperature-resistant metal fiber membrane-coated filter material |
| CN112715539A (en) * | 2021-01-28 | 2021-04-30 | 菲吉乐科(南京)生物科技有限公司 | Auxiliary penetrating agent suitable for bacteriophage to penetrate into tuber crops and preparation method and application thereof |
| CN113040140A (en) * | 2021-01-28 | 2021-06-29 | 菲吉乐科(南京)生物科技有限公司 | Auxiliary penetrating agent suitable for bacteriophage to be immersed into lianas and woody plants and preparation method and application thereof |
| CN112715539B (en) * | 2021-01-28 | 2022-06-17 | 菲吉乐科(南京)生物科技有限公司 | Auxiliary penetrating agent suitable for bacteriophage to penetrate into tuber crops and preparation method and application thereof |
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Address after: 361100 No. 3 Xiang Yue Road, Torch Industrial Zone, Xiamen hi tech Zone, Fujian, Xiangan Patentee after: Xiamen Zhongchuang Environmental Protection Technology Co., Ltd Address before: 361100 No. 3 Xiang Yue Road, Torch Industrial Zone, Xiamen hi tech Zone, Fujian, Xiangan Patentee before: XIAMEN SAVINGS ENVIRONMENTAL Co.,Ltd. |