CN101543696A - Polytetrafluoroethylene fiber non-woven filter felt and method for manufacturing same - Google Patents
Polytetrafluoroethylene fiber non-woven filter felt and method for manufacturing same Download PDFInfo
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- CN101543696A CN101543696A CN200910050527A CN200910050527A CN101543696A CN 101543696 A CN101543696 A CN 101543696A CN 200910050527 A CN200910050527 A CN 200910050527A CN 200910050527 A CN200910050527 A CN 200910050527A CN 101543696 A CN101543696 A CN 101543696A
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Abstract
The invention relates to a polytetrafluoroethylene fiber non-woven filter felt, which consists of a base cloth and polytetrafluoroethylene fiber layers on an upper layer and a lower layer of the base cloth, wherein the base cloth is prepared from polytetrafluoroethylene fibers according to the conventional textile technology, and the upper and the lower layers are prepared from the polytetrafluoroethylene fibers according to a process for combining air laying and prickling reinforcement. The polytetrafluoroethylene fiber non-woven filter felt has the advantages that the process is practical, and the prepared filter felt has long service life, high filtration efficiency and moderate cost performance.
Description
Technical field
The present invention relates to a kind of filter felt, particularly a kind of polytetrafluoroethylfiber fiber non-woven filter felt that is used for flue gas and treating flour dust also relates to the preparation method of this filter felt simultaneously.
Background technology
At present, sack cleaner is bigger with filtrate fibre damage rate in process of production and antistatic property, need add a certain amount of antistatic additive during polytetrafluoroethylfiber fiber non-woven filter felt filtrate that routine is manufactured, fiber also need balance be placed 10 to 48 hours in the stainless steel drum simultaneously, cumbersome when traditional handicraft is made, product strainability and service life after the making are not ideal enough.
Summary of the invention
Technical problem of the present invention is that a kind of employing air lay and pinprick reinforcement process combined will be provided, and produces and both improves filtrate service life, filter efficiency height, physical and mechanical properties height, the polytetrafluoroethylfiber fiber non-woven filter felt of cost economy.
In order to solve above technical problem, the invention provides a kind of polytetrafluoroethylfiber fiber non-woven filter felt, this filter felt is made of the polytetrafluoroethylene fibre layer of base cloth and upper and lower layer thereof, and base cloth is to be made by traditional textile technology by polytetrafluoroethylene fibre, and base cloth layer plays the effect of enhancing; Upper and lower layer is to be made by the air lay technology that combines with pinprick reinforcement by polytetrafluoroethylene fibre.
A kind of preparation method of polytetrafluoroethylfiber fiber non-woven filter felt, the technical process of this method is:
(1) polytetrafluoroethylene fibre is made the polytetrafluoroethylene fibre layer through air-laid process;
The step of described air-laid process is:
1. fiber is opened bag;
2. fiber opening-employing air flow delivery fiber is to form the mixed and disorderly even fibre web of arranging of fiber;
3. fiber mixes;
4. fiber removal of impurities;
5. fiber mixes the cylinder of back feeding high speed rotary;
6. fibre shedding;
7. the air-flow conveying fiber is condensed into fleece;
8. export fleece-and evenly carry and condense upon on the lace curtaining, form distributed in three dimensions, in length and breadth to the little fleece of powerful difference by air-flow.
(2) stack the polytetrafluoroethylene fibre layer in polytetrafluoroethylene fibre base cloth above and below, preliminary pre-needling;
(3) main acupuncture;
(4) reel;
(5) debatching;
(6) thermal finalization;
(7) calendering;
(8) functionalization;
The step of functionalization is:
Impregnation process or face coat are handled; Preliminary drying; Bake curing.
(9) side cut is reeled;
(10) finished product.
Superior effect of the present invention is:
1) adopt air-laid process to make surface layer and replace machine in the wrong one-tenth net in the wrong to make surface layer, this technology is through the achievement of experimental summary repeatedly for a long time, by this technology can be faster and better produce polytetrafluoroethylfiber fiber non-woven filter felt;
2) the polytetrafluoroethylfiber fiber non-woven filter felt temperature tolerance is superior, the high temperature that ability is 240 ℃;
3) resistance to acids and bases is strong, and antioxygenic property is good;
4) smooth surface, easy-to-clean ash, running resistance is low;
5) have good low frictional properties, flame retardancy, insulating properties and thermal insulation;
6) filter efficiency height, long service life.
Description of drawings
Fig. 1 is the structural representation of filter felt of the present invention;
The number in the figure explanation:
1-polytetrafluoroethylene fibre base cloth; 2-polytetrafluoroethylene fibre layer;
3-coating.
The specific embodiment
See also shown in the accompanying drawing, the invention will be further described.
As shown in Figure 1, the invention provides a kind of polytetrafluoroethylfiber fiber non-woven filter felt, this filter felt is made of the polytetrafluoroethylene fibre layer 2 of base cloth 1 and upper and lower layer thereof, base cloth 1 is to be made by traditional textile technology by polytetrafluoroethylene fibre, and upper and lower polytetrafluoroethylene fibre layer 2 is to be made by the air lay technology that combines with pinprick reinforcement by polytetrafluoroethylene fibre.
A kind of preparation method of polytetrafluoroethylfiber fiber non-woven filter felt, the technical process of this method is:
(1) polytetrafluoroethylene fibre is made the polytetrafluoroethylene fibre layer through air-laid process;
Wherein air-laid process adopts the air flow delivery fiber, and to form the mixed and disorderly even fibre web of arranging of fiber, fiber is through shredding; Removal of impurities; Mix the cylinder of back feeding high speed rotary, further be carded to ultimate fibre, under the synergy of the centrifugal force of cylinder and air-flow, fiber comes off from sawtooth, condense upon on the lace curtaining by even conveying of air-flow, form distributed in three dimensions, in length and breadth to the little fleece of powerful difference.
The step of described air-laid process is:
1. fiber is opened bag;
2. fiber opening-employing air flow delivery fiber is to form the mixed and disorderly even fibre web of arranging of fiber;
3. fiber mixes;
4. fiber removal of impurities;
5. fiber mixes the cylinder of back feeding high speed rotary;
6. fibre shedding;
7. the air-flow conveying fiber is condensed into fleece;
8. export fleece-and evenly carry and condense upon on the lace curtaining, form distributed in three dimensions, in length and breadth to the little fleece of powerful difference by air-flow.
The cotton layer grammes per square metre that produces through air lay is 240g/m
2～335g/m
2, the centre sandwiches and together enters needing machine behind the polytetrafluoroethylene fibre base cloth and carry out acupuncture, and the net width is greater than more than the base cloth fabric width 20mm, and grammes per square metre is 650～800g/m
2Concrete composition of raw materials sees Table 1
Table 1
| The filtering material grammes per square metre | Individual layer fibre web grammes per square metre | The base cloth grammes per square metre |
| 650g/m 2 | 240g/m 2～260g/m 2 | 150g/m 2 |
| 700g/m 2 | 265g/m 2～285g/m 2 | 150g/m 2 |
| 750g/m 2 | 290g/m 2～310g/m 2 | 150g/m 2 |
| 800g/m 2 | 315g/m 2～335g/m 2 | 150g/m 2 |
Wherein the air-laid process parameter sees Table 2
Table 2
| Cylinder speed rpm/min | Work rod commentaries on classics degree rpm/min | Bellows commentaries on classics degree rpm/min | Taper net spee mt/min | Speed of production mt/mi n | Temperature 0C | Humidity % |
| 1200～2000 | 450～550 | 2500～3000 | 25～45 | 4～8 | 18～25 | 60～80 |
(2) stack the polytetrafluoroethylene fibre layer in polytetrafluoroethylene fibre base cloth above and below, preliminary pre-needling;
(3) main acupuncture;
Wherein the needling process parameter sees Table 3
Table 3
| Needing machine | The pricker model | Depth of needling mm | Punch frequency thorn/min | Input speed m/min | Output speed m/min |
| Pre-needling | 15×18×36 ×3.5R333 | 13 | 650 | 3.42 | 4.55 |
| Main acupuncture | 15×18× 38× 3M333 | 7.7 | 800 | 3.85 | 2.91 |
(4) reel;
(5) debatching;
(6) thermal finalization;
Wherein the heat setting process parameter sees Table 4
Table 4
| Treatment process | Speed m/min | Temperature 0C | Time min |
| Thermal finalization is handled | 7～12 | 210～260 | 6～10 |
(7) calendering;
Wherein calender process settings sees Table 5
Table 5
| Last central roll spacing mm | Middle lower roll spacing mm | Last roll temperature ℃ | In roll temperature ℃ | Following roll temperature ℃ | Speed m/ |
| 2～3 | 2～3 | 200～240 | 200～220 | 180～200 | 15～25 |
(8) functionalization: impregnation process or face coat are handled; Preliminary drying; Bake curing
The functionalization processing method is: the acupuncture process product impregnated in the polytetrafluoroethylene (PTFE) reagent or polytetrafluorethylecoatings coatings is done on the surface, filter material surface is formed receive sub-compacted zone to carry out both surface filtration;
A1, impregnated in the emulsion of polytetrafluoroethylene (PTFE) preparation, carry out the anti-soda acid coating film treatment of surface and deep layer.
Wherein the preparation of impregnation process emulsion sees Table 6, and technological parameter sees Table 7.
Table 6
| Reagent name | Matched proportion density % | Reagent name | Matched proportion density % |
| Polytetrafluoroethylene (PTFE) concentrates dispersion liquid | 15％～35％ | Adhesive | 1％～6％ |
| Silicone oil | 0.5％～2％ | Lead acetate | 0.2％～1％ |
| Silane coupler (A-151) | 0.5％～1.5％ | Water | All the other |
Table 7
| Treatment process | Speed m/in | Temperature ℃ | Time min | Band liquid measure g/m 2 |
| Impregnation process | 6～10 | 220～250 | 8～12 | 30～50 |
A2, preliminary drying;
A3, bake curing
Or B1, product surface carry out polytetrafluorethylecoatings coatings, makes filter material surface be laminated with one deck superfine nano compacted zone, can carry out both surface filtration and combine with in-depth filtration.
Wherein the coating process parameter sees Table 8
Table 8
| Treatment process | Reagent name | Speed m/min | Temperature ℃ | Time min | Band liquid measure g/m 2 |
| Coating is handled | Polytetrafluoroethylene (PTFE) concentrates dispersion liquid | 10～15 | 220～250 | 6～8 | 60～80 |
B2, preliminary drying;
B3, bake curing
(9) side cut is reeled;
(10) finished product.
This polytetrafluoroethylfiber fiber non-woven filter felt is widely used in industry dust removal and filtrations such as cement plant, incinerator, power plant, chemical plant, steel plant.
Claims (4)
1, a kind of polytetrafluoroethylfiber fiber non-woven filter felt is characterized in that:
This filter felt is made of the polytetrafluoroethylene fibre layer of base cloth and upper and lower layer thereof, and base cloth is to be made by traditional textile technology by polytetrafluoroethylene fibre, and upper and lower layer is to be made by the air lay technology that combines with pinprick reinforcement by polytetrafluoroethylene fibre.
2, by the preparation method of the described polytetrafluoroethylfiber fiber non-woven filter felt of claim 1, the technical process of this method is:
(1) polytetrafluoroethylene fibre is made the polytetrafluoroethylene fibre layer through air-laid process;
(2) stack the polytetrafluoroethylene fibre layer in polytetrafluoroethylene fibre base cloth above and below, preliminary pre-needling;
(3) main acupuncture;
(4) reel;
(5) debatching;
(6) thermal finalization;
(7) calendering;
(8) functionalization;
(9) side cut is reeled;
(10) finished product.
3, by the preparation method of the described polytetrafluoroethylfiber fiber non-woven filter felt of claim 2, it is characterized in that:
The step of described air-laid process is:
1. fiber is opened bag;
2. fiber opening-employing air flow delivery fiber is to form the mixed and disorderly even fibre web of arranging of fiber;
3. fiber mixes;
4. fiber removal of impurities;
5. fiber mixes the cylinder of back feeding high speed rotary;
6. fibre shedding;
7. the air-flow conveying fiber is condensed into fleece;
8. export fleece-and evenly carry and condense upon on the lace curtaining, form distributed in three dimensions, in length and breadth to the little fleece of powerful difference by air-flow.
4, by the preparation method of the described polytetrafluoroethylfiber fiber non-woven filter felt of claim 2, it is characterized in that:
The step of described functionalization is:
1) impregnation process or face coat are handled;
2) preliminary drying;
3) bake curing.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101869793A (en) * | 2010-06-04 | 2010-10-27 | 宋朋泽 | Polyfluortetraethylene fiber filter material and preparation method thereof |
| CN102814081A (en) * | 2012-08-13 | 2012-12-12 | 安德鲁工业纺织品制造(上海)有限公司 | Filtration material for dust removing equipment |
| CN108704388A (en) * | 2018-06-25 | 2018-10-26 | 中山市绿浪助剂有限公司 | Polytetrafluoroethylene felt and preparation method thereof |
-
2009
- 2009-05-04 CN CN200910050527A patent/CN101543696A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101869793A (en) * | 2010-06-04 | 2010-10-27 | 宋朋泽 | Polyfluortetraethylene fiber filter material and preparation method thereof |
| CN101869793B (en) * | 2010-06-04 | 2012-05-30 | 宋朋泽 | Polyfluortetraethylene fiber filter material and preparation method thereof |
| CN102814081A (en) * | 2012-08-13 | 2012-12-12 | 安德鲁工业纺织品制造(上海)有限公司 | Filtration material for dust removing equipment |
| CN108704388A (en) * | 2018-06-25 | 2018-10-26 | 中山市绿浪助剂有限公司 | Polytetrafluoroethylene felt and preparation method thereof |
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Open date: 20090930 |