CN103877785B - Modification processing method before non-thermal plasticity chemical fibre filtrate overlay film - Google Patents
Modification processing method before non-thermal plasticity chemical fibre filtrate overlay film Download PDFInfo
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- CN103877785B CN103877785B CN201210565133.4A CN201210565133A CN103877785B CN 103877785 B CN103877785 B CN 103877785B CN 201210565133 A CN201210565133 A CN 201210565133A CN 103877785 B CN103877785 B CN 103877785B
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Abstract
The invention discloses the modification processing method before a kind of non-thermal plasticity chemical fibre filtrate overlay film, its composition comprises modifier and dipping or spray treatment, its concrete processing method comprises the steps: PTFE dispersion liquid, stabilizing agent, bleeding agent and water, proportionally stir, obtain the modifier before non-thermal plasticity chemical fibre filtrate overlay film; Again modifier is passed through dipping or spraying equipment, modifier is infiltrated filtrate top layer, then through drying and high temperature sintering, finally forming equally distributed PTFE Granular composite layer on filtrate top layer, this completes the modification before non-thermal plasticity chemical fibre filtrate overlay film.The non-thermal plasticity chemical fibre filtrate of such process, by after hot coating method, can obtain the coated filter material that fastness, Air permenbility and thickness are all qualified, and be widely used in the industries such as cement, iron and steel, smelting, chemical industry.
Description
Technical field
Deduster corollary apparatus field of the present invention, 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 more and more pays close attention to the discharge of PM2.5 dust in recent years, causes increasing enterprise to adopt the coated filter material with more high filtering precision at process industrial tail gas.But non-thermal plasticity chemical fibre coated filter material is all that the method adopting glue to cover is produced on market; namely at base material top layer coating last layer adhesive; again by PTFE(polytetrafluoroethylene (PTFE)) film adhere to get on; due to the serviceability temperature general lower (≤150 DEG C) of adhesive; and coated filter material requires to be used in 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 coated filter material is caused to lose efficacy.
The method of hot compress is generally adopted now to produce coated filter material, the method reaches to polyester (PET), polypropylene (PP), polyphenylene sulfide (PPS) etc. the thermoplastic fibre that namely fusing point melt, do not need to carry out pre-treatment, just directly can carry out thermal-adhering.But it is non-fusible for inclined aromatic polyamides (Aramid), partially aromatic polyimide (PI), polyacrylonitrile (AC/DT) etc., also without the non-thermoplastic fiber of fusing point, directly can not carry out thermal-adhering.
As everyone knows, PTFE is the macromolecule organic material that a kind of chemical inertness is very strong, and to be bondd obtained PTFE membrane filter material by common binding agent and non-thermoplastic fiber's filtrate, 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, enable 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%, and surplus is water, stirs and is placed in reservoir;
Step 2, again by modifier by dipping or spraying equipment, modifier is infiltrated 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 Granular composite layer, this completes the modification before non-thermal plasticity chemical fibre filtrate overlay film.
In described step 1, the PTFE domain size distribution of PTFE dispersion liquid is 0.1 ~ 0.4 μm, wherein PTFE molecular weight >=1W, solid constituent mass fraction >=50%, and pH value is 6 ~ 8; Bleeding agent is the calcium stearate of white powder, active ingredient >=60%.
In described step 1, the PTFE domain size distribution of PTFE dispersion liquid is 0.1 ~ 0.4 μm, wherein PTFE molecular weight >=1W, solid constituent mass fraction >=50%, and pH value is 6 ~ 8; Bleeding agent is the dodecyl sodium sulfate of white or light yellow powder, wherein active ingredient >=40%.
Described step 2 adopts impregnating equipment, then 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.
Be under modified non-thermal plasticity filtrate is placed in the temperature of 180 DEG C ~ 210 DEG C in described step 3, dried through 10 ~ 15 minutes, then at the temperature being placed in 210 DEG C ~ 250 DEG C, cured through 5 ~ 10 minutes, filtrate is increased weight 50 ~ 100g/m
2, non-thermoplastic fiber's filtrate top layer defines resistant to elevated temperatures polytetrafluoroethylene (PTFE) dispersion layer.
Step 4 after described step 3 is by laminating machine, and control temperature is 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, carries out the hot pressing compound of non-thermoplastic fiber's filtrate and polytetrafluoroethylene (PTFE) porous membranes.
After adopting such scheme, the present invention is by after special modifier dipping or spray treatment, the modified layer of one deck polytetrafluoroethylene (PTFE) is formed between non-thermoplastic fiber's filtrate top layer and polytetrafluoroethylene (PTFE) porous membranes, again by high temperature hot pressing technique, make Final finishing layer and polytetrafluoroethylene (PTFE) porous membranes that melting occur under high temperature hot pressing condition to fit, material is thus formed the novel fire resistant coated filter material that a kind of fastness is high.
Detailed description of the invention
Introduce the present invention further below by specific embodiment, but embodiment does not limit the scope of the invention.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 change or amendment to 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.
Present invention is disclosed the modification processing method before a kind of non-thermal plasticity chemical fibre filtrate overlay film, 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%, and surplus is water, stirs and is placed in reservoir; Wherein the PTFE domain size distribution of PTFE dispersion liquid is 0.1 ~ 0.4 μm, wherein PTFE molecular weight >=1W, solid constituent mass fraction >=50%, and 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 light yellow powder, wherein active ingredient >=40%.
Step 2, again by modifier by dipping or spraying equipment, modifier is infiltrated non-thermal plasticity chemical fibre filtrate top layer, then through oven dry and high temperature sintering;
According to impregnating equipment, then its line speed is 5 ~ 7m/min, and controlling pick-up is 150 ~ 200%.
According to spraying equipment, be 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, this completes the modification before non-thermal plasticity chemical fibre filtrate overlay film, under specifically modified non-thermal plasticity filtrate being placed in the temperature of 180 DEG C ~ 210 DEG C, dried through 10 ~ 15 minutes, under being placed in the temperature of 210 DEG C ~ 250 DEG C again, cured through 5 ~ 10 minutes, make filtrate weightening finish 50 ~ 100g/m
2, non-thermoplastic fiber's filtrate top layer defines resistant to elevated temperatures polytetrafluoroethylene (PTFE) dispersion layer.
Step 4, by laminating machine, control temperature is 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, carries out the hot pressing compound of non-thermoplastic fiber's filtrate and polytetrafluoroethylene (PTFE) porous membranes.
The non-thermal plasticity chemical fibre coated filter material produced 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 drain concentration | mg/Nm 3 | ≤10 |
Running resistance | Pa | ≤1200 |
Embodiment one: aromatic polyamides coated filter material partially
The modifier of 1.1 configuration polytetrafluoroethylene (PTFE) dippings or spraying: add various auxiliary agent successively according to following formula, and Keep agitation 20 ~ 30 minutes, for subsequent use
Auxiliary agent title | Weight ratio % |
PTFE dispersion liquid | 40 |
Stabilizing agent | 6 |
Infiltrate agent | 8 |
Water | 46 |
Inclined aromatic polyamides filtrate is carried out impregnation process by 1.2, and pick-up controls 130%.
1.3 the more inclined aromatic polyamides filtrate after dipping is placed in the temperature of 190 DEG C under, dried through 15 ~ 30 minutes, then at the temperature being placed in 240 DEG C, cured through 5 ~ 10 minutes.
1.4 temperature setting laminating machine are 320 DEG C, and pressure is 0.1MPa, and line speed is 12m/min, and the inclined aromatic polyamides filtrate cured is passed through laminating machine together with polytetrafluoroethylene (PTFE) porous membranes.Inclined aromatic polyamides coated filter material can be obtained.
The performance indications of inclined aromatic polyamides coated filter material
Project | Unit | Performance indications |
Air permenbility | L/dm 2.min | 25 |
Cover and fastness | MPa | 0.13 |
Filter efficiency | % | 99.995 |
Outlet drain concentration | mg/Nm 3 | 0.54 |
Running resistance | Pa | ≤1100 |
Embodiment two: aromatic polyimide coated filter material partially
The modifier of 2.1 configuration polytetrafluoroethylene (PTFE) dippings or spraying: add various auxiliary agent successively according to following formula, and Keep agitation 20 ~ 30 minutes, for subsequent use
Auxiliary agent title | Weight ratio % |
PTFE dispersion liquid | 70 |
Stabilizing agent | 8 |
Infiltrate agent | 8 |
Water | 14 |
The speed that sprays of 2.2 setting flush coaters is 50g/min, and line speed is 7m/min, double-face spray painting.
2.3 more modified inclined aromatic polyimide filtrate is placed in the temperature of 210 DEG C under, dried through 15 ~ 30 minutes, then at the temperature being placed in 250 DEG C, cured through 10 ~ 15 minutes.
2.4 temperature setting laminating machine are 360 DEG C, and pressure is 0.4MPa, and line speed is 15m/min, and the inclined aromatic polyimide filtrate cured is passed through laminating machine together with polytetrafluoroethylene (PTFE) porous membranes.Inclined aromatic polyimide coated filter material can be obtained.
The performance indications of inclined aromatic polyimide coated filter material
Project | Unit | Performance indications |
Air permenbility | L/dm 2.min | 30 |
Cover and fastness | MPa | 0.11 |
Filter efficiency | % | 99.998 |
Outlet drain concentration | mg/Nm 3 | 0.41 |
Running resistance | Pa | ≤1080 |
Claims (5)
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%, and surplus is water, stirs and is placed in reservoir; In described step 1, the PTFE domain size distribution of PTFE dispersion liquid is 0.1 ~ 0.4 μm, wherein PTFE molecular weight >=1W, solid constituent mass fraction >=50%, and pH value is 6 ~ 8; Bleeding agent is the white powder calcium stearate of active ingredient >=60% or the white of active ingredient >=40% or light yellow powder dodecyl sodium sulfate;
Step 2, again by modifier by dipping or spraying equipment, modifier is infiltrated 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 Granular composite layer, this completes 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: described step 2 adopts impregnating equipment, then its line speed is 5 ~ 7m/min, and controlling pick-up is 150 ~ 200%.
3. the modification processing method before non-thermal plasticity chemical fibre filtrate overlay film as claimed in claim 1, it is characterized in that: described step 2 adopts spraying equipment, is carry out double-face spray painting, and the quantity for spray of each is 40 ~ 80g/min, and line speed is 6 ~ 10m/min.
4. the modification processing method before non-thermal plasticity chemical fibre filtrate overlay film as claimed in claim 1, it is characterized in that: be under modified non-thermal plasticity filtrate is placed in the temperature of 180 DEG C ~ 210 DEG C in described step 3, dried through 10 ~ 15 minutes, under being placed in the temperature of 210 DEG C ~ 250 DEG C again, cured through 5 ~ 10 minutes, make filtrate weightening finish 50 ~ 100g/m
2, non-thermoplastic fiber's filtrate top layer defines resistant to elevated temperatures polytetrafluoroethylene (PTFE) dispersion layer.
5. the modification processing method before non-thermal plasticity chemical fibre filtrate overlay film as claimed in claim 1, it is characterized in that: the step 4 after described step 3 passes through laminating machine, control temperature is 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, carries out the hot pressing compound of non-thermoplastic fiber's filtrate and polytetrafluoroethylene (PTFE) porous membranes.
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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 |
CN105970517B (en) * | 2016-06-21 | 2018-05-15 | 安徽元琛环保科技股份有限公司 | A kind of method for sorting of fine spraying filtrate and application |
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 |
CN113040140B (en) * | 2021-01-28 | 2022-06-03 | 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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CN102808326A (en) * | 2012-08-13 | 2012-12-05 | 中材科技股份有限公司 | Preparation method for modified inorganic fiber cloth |
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CN201192604Y (en) * | 2008-02-19 | 2009-02-11 | 厦门美达斯环保工业有限公司 | Filter material of environment friendly dust collector |
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