CN102527156A - Production process for polytetrafluoroethylene (PTFE) aqua tex composite high-temperature tail gas filter material - Google Patents
Production process for polytetrafluoroethylene (PTFE) aqua tex composite high-temperature tail gas filter material Download PDFInfo
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- CN102527156A CN102527156A CN2011104410393A CN201110441039A CN102527156A CN 102527156 A CN102527156 A CN 102527156A CN 2011104410393 A CN2011104410393 A CN 2011104410393A CN 201110441039 A CN201110441039 A CN 201110441039A CN 102527156 A CN102527156 A CN 102527156A
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Abstract
The invention relates to a production process for a polytetrafluoroethylene (PTFE) aqua tex composite high-temperature tail gas filter material, which belongs to the technical field of spinning filter materials. Polytetrafluoroethylene fibers and glass fiber base fabrics are adopted as raw materials. Firstly, the polytetrafluoroethylene fibers are detected and weighted, then sequentially fed into a long curtain, a horizontal opener, a large-cabinet and a fine opener, combed by a combing machine 1 and a combing machine 2 in layering mode, and respectively fed into a cross lapping machine 1 and a cross lapping machine 2 to be lapped. The glass fiber base fabrics are laminated between the raw materials sent out of the cross lapping machine 1 and the cross lapping machine 2 to be coincided and then sequentially is processed by a prewetting process, an aqua tex process, a dewatering process, a drying process and a coiling process. The PTFE aqua tex composite high-temperature tail gas filter material is strong in mechanical performance, filter performance, high temperature resistance and chemical corrosion resistance and stable in size.
Description
Technical field
The present invention relates to a kind of production technology of PTFE water thorn combined high temperature tail gas filtering material, belong to weaving filtering material technical field.
Background technology
Environmental problem has become one of bottleneck of China's economic development, follows economic development and the environmental pollutant discharge of coming has surpassed the bearing capacity of environment, and the environmental problem of long-term accumulation solves as yet well.Ecological environment is being faced with great challenge, and environmental protection has become the restraining factors of Chinese society economic development.Filter bag is the core cell of bag-type dusting environmental protection equipment.And filter bag is easily worn part, must change in 2～3 years, and therefore, the market potential of filter bag is huge, especially aspect the high temperature filter bag.But the homemade filter bag of China nearly all is a low-and-medium-grade products, not only can't contend with international advanced filter bag, also can't adapt to the environment protection standard requirement of variant working condition.Facts have proved that the structure optimization of filter pocket material not only can improve the filter effect of filter bag, and can improve the overall performance of dedusting environment friendly system.
Summary of the invention
The present invention provides a kind of mechanical performance, strainability, resistance to elevated temperatures, resistance to chemical corrosion strong, and the production technology of the PTFE water of dimensionally stable thorn combined high temperature tail gas filtering material.
To achieve these goals, the technical scheme that the present invention adopted is:
A kind of production technology of PTFE water thorn combined high temperature tail gas filtering material, adopting polytetrafluoroethylene fibre and glass base cloth is raw material; Earlier with the polytetrafluoroethylene fibre feeding of testing, weigh; Feed long curtain, horizontal opener, big storehouse blending box, refined opener more successively; Carry out the layering combing by carding machine one, carding machine two then; Enter into respectively again on cross lapping machine one, the cross lapping machine two and carry out lapping; Then the glass base cloth is folded in by between the raw material that transports out on cross lapping machine one, the cross lapping machine two and carry out superimposedly, gets into the operation of prewetting, water thorn operation, dehydration procedure, baking operation, coiling process more successively.
As the further setting of such scheme,
Said carding machine one, main cylinder working roll is 110m/min, main cylinder angle stripper is 150m/min, main cylinder rotating speed 1380 m/min, the feeding grammes per square metre is 40 Ke/㎡.
Said carding machine two, main cylinder working roll is 105m/min, main cylinder angle stripper is 145m/min, main cylinder rotating speed 1350 m/min, the feeding grammes per square metre is 55 Ke/㎡.
Said cross lapping machine one and cross lapping machine two, its cross lapping number of plies is 4 layers.
Said water thorn operation, its spun-laced machine comprises 7 water jets, each water jet water thorn pressure is set at respectively: 40bar, 110bar, 135bar, 168bar, 158bar, 145bar, 105bar.
Said baking operation, its dryer temperature are controlled at 125 ℃～140 ℃.
The production technology of PTFE water thorn combined high temperature tail gas filtering material of the present invention; Raw materials used is glass base cloth and polytetrafluoroethylene fibre (PTFE); The compound certain thickness PTFE fibre web on the two sides of glass base cloth, through water jet process that this fibrage and base cloth processing is compound.The PTFE fiber is a kind of high-performance fiber of function admirable; At high temperature have good intensity, rigidity and fatigue durability; Its chemical resistance is extremely strong; Can resist the corrosion of various chemicals, therefore just make this composite filter material of producing, can filter the complicated high-temperature gas of character applicable to various complex environments.
Simultaneously, when the water acupuncture manipulation was reinforced this composite, in water thorn process, fiber tangled by the puncture effect of high-pressure injection current each other.The result causes the arrangement again of fiber and tangles each other, has realized the reinforcing to fibre web.Fiber is always pushed away under with the simplest effect of path in waterpower along the direction of current and is drawn.Space between the fiber is moved and inserts fibre bundle, makes fibre web evenly and not damaged by mechanical external force.Do not have mechanical damage can stop grit to pass through fluffy filter medium effectively, impel the barrier properties of material to improve.
This water jet process and the thinner fiber that can be used for this kind technology make on non-weaving cloth, only to stay very tiny perforate.This makes filter medium that higher air penetrability arranged and compares with numerous needled conventionallies or fabric filtration medium to have identical even better filter efficiency.Hydro-entangled non-woven fabric surface is better with the cross section uniformity, the hole more closely, better, the less perforated area of pore-size distribution control and do not have penetrating hole.
Innovative point of the present invention mainly is the apolegamy of raw material and the innovation of production technology.
1, novelty selects the raw material of PTFE (polyphenylene sulfide) high-performance fiber as water jet process for use; Study the Technological adaptability of physicochemical property, structure, one-tenth net and the reinforcing of this fiber; Adapt to the efficient high-speed combing and produce, improve the entanglement effect of water thorn, the mechanical strength of water thorn composite filter material is significantly improved fiber; Guarantee that final products have favorable mechanical performance, strainability, chemical resistance and dimensional stability etc., meet the requirement of bag-type dusting filtering technique.
2, the water of novelty thorn technology processing composite filter material
Traditional fire resistant filter material all adopts needling process processing; This new product adopts water jet process processing, behind water under high pressure needle penetration fibre web and the base cloth, forms bounce-back in drum surface; Directly impact and reflect under the double action of liquid drugs injection at liquid drugs injection, form fibre web and the base cloth composite construction that closely tangles.Compare with needling process, the flexibility of water jet process is tangled and is made that the strength retention of base cloth and fiber is enhanced in the composite filtering material, thus the brute force of the final products of raising.Distinctive this performance of water jet process and the thinner fiber that can be used for this kind technology make on non-weaving cloth, only to stay very tiny perforate.This makes filter medium that higher air penetrability arranged and compares with the needled conventionally filter medium to have identical even better filter efficiency.Simultaneously, water thorn filter medium can be saved fiber 10%～15%.
According to the performance requirement of bag-type dusting filtering material, this product has also adopted following these key technologies on existing energy-efficient water jet process technology and water jet process water circular treatment technical foundation.
1, adopts the oil formula that can improve carding and the adaptive PTFE high-performance fiber of Hydroentangled reinforcement process.
PTFE belongs to chemical fibre, and its regain is very low, in shredding, carding process, between the fiber, can produce electrostatic effect between fiber and the shredding equipment, influences shredding combing shredding effect.If can not well prewet fibre web, can influence the entanglement effect of fiber in the product in the water thorn process.Therefore to select for use suitable oil formula that fiber is carried out preliminary treatment, make fiber have certain hydrophily, improve the shredding carding effect of fiber, reach good entanglement effect.
2, novel spun-laced entanglement composite technology
The tradition water jet process is mainly used in reinforces 30g/m
2～80g/m
2Low grammes per square metre hydro-entangled non-woven fabrics such as health care, wet towel.According to the product performance of this project water thorn composite filter material, the grammes per square metre that its high-performance fiber filters surface layer has surpassed 150g/m
2, so its Hydroentangled composite technology obviously is different from the traditional water thorn.
To the thick fibre web entanglement of high-performance fibers such as PTFE and compound with the enhancing base cloth, product adopts the Hydroentangled composite technology of high pressure.High-efficiency and energy-saving type water under high pressure tartar, the water jet inner-cavity structure of employing optimal design is eliminated the eddy current that produces in the water jet system cavate, reduces energy loss, guarantees that simultaneously water jet system lateral current evenly distributes; Adopt the pass of the water spray plate hole for water spraying of optimal design, improve the convergence of water jet, guarantee the impact energy of water jet, reach the effect of fibre web entanglement preferably, reach energy-conservation target with less discharge.The adjustable inlet scoop of spun-laced machine dewatering box and rotary drum bounce-back winding device; Guarantee rebound effect and even swabbing action on the whole working width of rotary drum; Make fibre web can effectively absorb the liquid drugs injection energy; Under low hydraulic condition, the fibre web and make fibre web tangle compoundly with strengthening base cloth of effectively tangling reaches energy-efficient purpose.
3, water thorn composite filter material material uniformity control technology
The gap of non-woven final products fibre net homogeneity is bigger, is mainly reflected on output and the fabric quality.Product adopts advanced self-regulating technology; Carding machine, cross lapping and the detection of final products grammes per square metre are linked together, form a comprehensive closed-loop system of control automatically, detect the fibre web uniformity in process of production all the time; Detecting data feeds back on the computer; By the technological parameter of computer control change lapping machine and carding machine, automatic compensation adjustment fibre net homogeneity, thus guarantee that final water stings the uniformity of composite filter material material.
4, novel rear finishing duplex technology
The fibre web surface hairiness that water jet process processes is many, is unfavorable for reaching some good performances of final high temperature resistant filtering product, such as deashing property, resistive connection dew and the decay resistance etc. of product.Therefore will carry out post processing to product surface, in the last handling process product taked the single face processing of singing, the final products smooth surface reaches the effect of resistive connection dew, easy-to-clean ash, good corrosion resistance.
The specific embodiment
The production technology of PTFE water thorn combined high temperature tail gas filtering material of the present invention, adopting polytetrafluoroethylene fibre and glass base cloth is raw material; Earlier with the polytetrafluoroethylene fibre feeding of testing, weigh; Feed long curtain, horizontal opener, big storehouse blending box, refined opener more successively; Carry out the layering combing by carding machine one, carding machine two then; Enter into respectively again on cross lapping machine one, the cross lapping machine two and carry out lapping; Then the glass base cloth is folded in by between the raw material that transports out on cross lapping machine one, the cross lapping machine two and carry out superimposedly, gets into the operation of prewetting, water thorn operation, dehydration procedure, baking operation, coiling process more successively.
Wherein, carding machine one, main cylinder working roll is 110m/min, main cylinder angle stripper is 150m/min, main cylinder rotating speed 1380 m/min, the feeding grammes per square metre is 40 Ke/㎡.
Carding machine two, main cylinder working roll is 105m/min, main cylinder angle stripper is 145m/min, main cylinder rotating speed 1350 m/min, the feeding grammes per square metre is 55 Ke/㎡.
Cross lapping machine one and cross lapping machine two, its cross lapping number of plies is 4 layers.
Water thorn operation, its spun-laced machine comprises 7 water jets, each water jet water thorn pressure is set at respectively: 40bar, 110bar, 135bar, 168bar, 158bar, 145bar, 105bar.
Baking operation, its dryer temperature are controlled at 125 ℃～140 ℃.
The basic mechanical design feature index of product of the present invention is following:
(1) mass area ratio: 798.4g/m
2
(2) thickness (mm): 1.98;
(3) powerful characteristic (N/5 * 20cm): vertical 2152, horizontal 819;
(4) elongation characteristics (%): vertical 6.3, horizontal 9.6;
(5) ventilating performance (m
3/ m
2Min): 1.75; Serviceability temperature (℃): 240;
(6) drag characteristic is dynamically filtered dirt resistance (Pa): 510;
(7) the filter dynamic efficiency of dust collection of dirt characteristic (%): 99.3;
(8) dust is peeled off rate (%): 65.90.
Can find out that by above-mentioned performance indications the PTFE water thorn combined high temperature tail gas filtering material product of producing has reached the filtering product standard, can be good at satisfying the filtration needs.
The present invention is used for water thorn technology the manufacturing of compound PTFE high-performance fiber filtering material; The draw point that the flexibility entanglement complex technique of water thorn efficiently solves buckle in the general acupuncture technology is to the inevitable damage problem of base cloth long filament; Broken through a large amount of bottleneck constraints of cutting off long filament and causing the filter bag mechanical strength to descend in the acupuncture recombination process, compound back base cloth strength retention reaches more than 98%.
The foregoing description only is used to the inventive concept of the present invention of explaining, but not to the qualification of rights protection of the present invention, allly utilizes this design that the present invention is carried out the change of unsubstantiality, all should fall into protection scope of the present invention.
Claims (6)
1. the production technology of PTFE water thorn combined high temperature tail gas filtering material, it is characterized in that: adopting polytetrafluoroethylene fibre and glass base cloth is raw material; Earlier with the polytetrafluoroethylene fibre feeding of testing, weigh; Feed long curtain, horizontal opener, big storehouse blending box, refined opener more successively; Carry out the layering combing by carding machine one, carding machine two then; Enter into respectively again on cross lapping machine one, the cross lapping machine two and carry out lapping; Then the glass base cloth is folded in by between the raw material that transports out on cross lapping machine one, the cross lapping machine two and carry out superimposedly, gets into the operation of prewetting, water thorn operation, dehydration procedure, baking operation, coiling process more successively.
2. the production technology of PTFE water thorn combined high temperature tail gas filtering material according to claim 1; It is characterized in that: said carding machine one, main cylinder working roll is 110m/min, main cylinder angle stripper is 150m/min; Main cylinder rotating speed 1380 m/min, the feeding grammes per square metre is 40 Ke/㎡.
3. the production technology of PTFE water thorn combined high temperature tail gas filtering material according to claim 1; It is characterized in that: said carding machine two, main cylinder working roll is 105m/min, main cylinder angle stripper is 145m/min; Main cylinder rotating speed 1350 m/min, the feeding grammes per square metre is 55 Ke/㎡.
4. the production technology of PTFE water thorn combined high temperature tail gas filtering material according to claim 1, it is characterized in that: said cross lapping machine one and cross lapping machine two, its cross lapping number of plies is 4 layers.
5. the production technology of PTFE water thorn combined high temperature tail gas filtering material according to claim 1; It is characterized in that: said water thorn operation; Its spun-laced machine comprises 7 water jets, and each water jet water thorn pressure is set at respectively: 40bar, 110bar, 135bar, 168bar, 158bar, 145bar, 105bar.
6. the production technology of PTFE water thorn combined high temperature tail gas filtering material according to claim 1, it is characterized in that: said baking operation, its dryer temperature are controlled at 125 ℃～140 ℃.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104410393A CN102527156A (en) | 2011-12-26 | 2011-12-26 | Production process for polytetrafluoroethylene (PTFE) aqua tex composite high-temperature tail gas filter material |
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|---|---|---|---|
| CN2011104410393A CN102527156A (en) | 2011-12-26 | 2011-12-26 | Production process for polytetrafluoroethylene (PTFE) aqua tex composite high-temperature tail gas filter material |
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Cited By (5)
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| CN104711758A (en) * | 2015-03-18 | 2015-06-17 | 浙江和中非织造股份有限公司 | Production process for new sound absorption and noise reduction automotive interior spunlace non-woven material |
| CN104894754A (en) * | 2014-12-31 | 2015-09-09 | 富阳纬业基布有限公司 | A method for preparing superfine fiber composite cloth |
| CN108434863A (en) * | 2018-04-02 | 2018-08-24 | 浙江富瑞森水刺无纺布有限公司 | Corrosion-resistant high grammes per square metre spun lacing filtrate and its preparation process |
| WO2020075075A1 (en) | 2018-10-08 | 2020-04-16 | Universidade Do Porto | Process for preparation of cellulose based carbon molecular sieve membranes and membranes thereof |
| CN114734697A (en) * | 2022-03-19 | 2022-07-12 | 晋江市港益纤维制品有限公司 | Manufacturing process of base fabric in gauze |
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| CN104894754A (en) * | 2014-12-31 | 2015-09-09 | 富阳纬业基布有限公司 | A method for preparing superfine fiber composite cloth |
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| CN104711758A (en) * | 2015-03-18 | 2015-06-17 | 浙江和中非织造股份有限公司 | Production process for new sound absorption and noise reduction automotive interior spunlace non-woven material |
| CN108434863A (en) * | 2018-04-02 | 2018-08-24 | 浙江富瑞森水刺无纺布有限公司 | Corrosion-resistant high grammes per square metre spun lacing filtrate and its preparation process |
| WO2020075075A1 (en) | 2018-10-08 | 2020-04-16 | Universidade Do Porto | Process for preparation of cellulose based carbon molecular sieve membranes and membranes thereof |
| CN114734697A (en) * | 2022-03-19 | 2022-07-12 | 晋江市港益纤维制品有限公司 | Manufacturing process of base fabric in gauze |
| CN114734697B (en) * | 2022-03-19 | 2023-12-08 | 晋江市港益纤维制品有限公司 | Manufacturing process of gauze middle base fabric |
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Application publication date: 20120704 |