CN109848408A - A kind of superhigh precision fibrofelt and preparation method thereof - Google Patents
A kind of superhigh precision fibrofelt and preparation method thereof Download PDFInfo
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- CN109848408A CN109848408A CN201910083945.7A CN201910083945A CN109848408A CN 109848408 A CN109848408 A CN 109848408A CN 201910083945 A CN201910083945 A CN 201910083945A CN 109848408 A CN109848408 A CN 109848408A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 25
- 239000000835 fiber Substances 0.000 claims abstract description 232
- 238000005245 sintering Methods 0.000 claims abstract description 65
- 238000012360 testing method Methods 0.000 claims abstract description 15
- 230000035699 permeability Effects 0.000 claims abstract description 14
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 238000003466 welding Methods 0.000 claims abstract description 10
- 238000009659 non-destructive testing Methods 0.000 claims abstract description 8
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 28
- 239000000126 substance Substances 0.000 claims description 23
- 239000007789 gas Substances 0.000 claims description 19
- 229910052757 nitrogen Inorganic materials 0.000 claims description 14
- 238000010791 quenching Methods 0.000 claims description 14
- 230000000171 quenching effect Effects 0.000 claims description 14
- 238000001914 filtration Methods 0.000 claims description 13
- 238000007689 inspection Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 238000009738 saturating Methods 0.000 claims description 9
- 238000000926 separation method Methods 0.000 claims description 9
- 238000010792 warming Methods 0.000 claims description 8
- 238000005096 rolling process Methods 0.000 claims description 7
- 238000012797 qualification Methods 0.000 claims description 6
- -1 compares Substances 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 241001391944 Commicarpus scandens Species 0.000 description 2
- 238000010923 batch production Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
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Abstract
The invention discloses a kind of superhigh precision fibrofelts and preparation method thereof, comprising the following steps: step 1) combines superfine fibre；Step 2 carries out the paved ultra-fine fibre web of formation of nonwoven；Step 3) carries out uniformity testing；Step 4) makes fiber felt blanket；Step 5) in planisher using being rolled；Step 6) is sent into vacuum sintering furnace and is diffused welding；Step 7) carries out double sintering；Step 8) progress is smooth, measures its bubble point pressure and permeability using bubble point detector and nondestructive testing instrument；Step 9) is welded as chimney filter after fiber felt blanket is carried out folding wave, carries out bubble point detection after folding wave to it and meets the requirements as superhigh precision fibrofelt.
Description
Technical field
The invention belongs to filter core preparation technical field more particularly to a kind of superhigh precision fibrofelt and its preparation sides
Method.
Background technique
Metal fiber felt is commonly used for preparing chemical fiber filter filter, filtering accuracy generally in 10 ~ 40 μ ms, and
Aerospace hydraulic oil filtering needs to reach 3 ~ 5 μm with the usual precision of fibrofelt, and the current country rarely has producer that can prepare in batches
This superhigh precision fibrofelt, also discloses the technology of superhigh precision fibrofelt without any document.
Summary of the invention
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, a kind of superhigh precision fibrofelt and its preparation are provided
Method, overcomes that filtering accuracy in the prior art is not high, is unable to the problems such as mass production.
In order to solve technical problem, the technical scheme is that a kind of preparation method of superhigh precision fibrofelt, including
Following steps:
String diameter is 2 μm by step 1), the superfine fibre that core number is 15000 cores is combineeed；
Superfine fibre after combining in step 1) is carried out the paved ultra-fine fibre web of formation of nonwoven using air-flow paving felt equipment by step 2；
Step 3) carries out uniformity testing to the ultra-fine fibre web in step 2；
Step 4) is using examining qualified ultra-fine fibre web and crude fibre net production fiber felt blanket in step 3), wherein crude fibre net
Filtering accuracy is 40 ~ 100 μm, and wherein the total substance of fiber felt blanket is 950 ~ 1000g/m2；
Step 5) rolls the fiber felt blanket in step 4) in planisher；
Fiber felt blanket after step 6) rolls step 5) is separated with separation layer, is sent into vacuum sintering furnace and is diffused welding；
Sintered fiber felt blanket is carried out thick smooth rear vacuum sintering furnace of being sent into and continues double sintering by step 7)；
Step 8) is smooth by the fiber felt blanket progress of double sintering in step 7), with a thickness of 0.4 ~ 0.5mm, the specification of fiber felt blanket
Including 3 μm of fiber felt blankets and 5 μm of fiber felt blankets, its bubble point pressure and gas permeability are measured using bubble point detector and nondestructive testing instrument
Energy；
Step 9) is welded as chimney filter after the fiber felt blanket in step 8) is carried out folding wave, carries out bubble point detection after folding wave to it and meets
It is required that being superhigh precision fibrofelt.
Preferably, the number of share of stock combineeed in the step 1) is 4 ~ 8 strands, and grammes per square metre is 6 ~ 9g/m.
Preferably, the licker-in speed of air-flow paving felt equipment is 1200 ~ 1500RPM in the step 2, and air-flow spreads felt equipment
Feeding roller speed be 60 ~ 90RPM, paved ultra-fine fibre web grammes per square metre be 50 ~ 100g/m2。
Preferably, in the step 3) uniformity testing the following steps are included:
Step 3-1) paved ultra-fine fibre web is placed in lamp inspection desk, uniformity is judged by translucency；
Step 3-2) in the length and wide direction of ultra-fine fibre web, respectively to take 6 diameters be the disk of Φ 60mm, substance is measured, is carried out pair
Than substance deviation is qualification in ± 5% range.
Preferably, fiber felt blanket is made of the ultra-fine fibre web of multilayer and the overlapping of multilayer crude fibre net in the step 4), wherein
Multilayer crude fibre net is set to two sides outer layer, and wherein the ultra-fine fibre web of multilayer is set to internal layer, the crude fibre net and ultra-fine fibre web
Number of plies ratio be 4:6.
Preferably, the vacuum degree of vacuum sintering furnace is 5.0 × 10 in the step 6)-2Pa, sintering temperature are 1020 ~ 1050
DEG C, and when being warming up to 900 DEG C with nitrogen air quenching.
Preferably, the vacuum degree of vacuum sintering furnace is 5.0 × 10 in the step 7)-2Pa, sintering temperature are 1120 ~ 1150
DEG C, and when being warming up to 900 DEG C with nitrogen air quenching.
Preferably, in the step 8) as bubble point pressure≤10000Pa of manufactured 3 μm of fiber felt blankets, saturating gas energy≤
10L/min.dm2Shi Xingneng reaches requirement；As bubble point pressure≤7500Pa of manufactured 5 μm of fiber felt blankets, saturating gas energy≤
40L/min.dm2Shi Xingneng reaches requirement.
Preferably, the wave height that folding wave is carried out in the step 9) is 8mm, wave number 45,3 μm of fiber felt blankets after rolling over wave
It meets the requirements when bubble point pressure≤8000Pa, meets the requirements when bubble point pressure≤6000Pa of 5 μm of fiber felt blankets after rolling over wave.
Preferably, a kind of superhigh precision fibrofelt, the superhigh precision fibrofelt are described in any item by claim 1 ~ 9
Preparation method is made.
Compared with the existing technology, the present invention has the advantages that
(1) superhigh precision fibrofelt permeability prepared by the present invention, bubble point pressure can reach requirement, and superfine fibre carries out gas
Ultra-fine fibre net homogeneity after stream method is paved is consistent, and product quality is controllable, and the fiber felt blanket after high temperature sintering is whole
Fastness is reliable, and it is not easy to break can to roll over wave；
(2) for superhigh precision fibrofelt produced by the present invention for making thin-film material filter element for filtration, filtering accuracy can achieve 3
μm, 5 μm, bubble point pressure respectively reaches 10000Pa, 7500Pa, and air permeability respectively reaches 10L/min.dm2、40L/min.dm2,
Bubble point pressure respectively reaches 8000Pa, 6000Pa after folding wave, and even aperture distribution solves the paved and mass of superfine fibre
High temperature sintering problem；
(3) preparation method rational technology of the present invention, it is simple to operation, it reduces costs simultaneously, provides production efficiency, can be used for
Batch production.
Specific embodiment
The specific embodiment of the invention is described below with reference to embodiment:
It should be noted that structure, ratio, size etc. that this specification is illustrated, only to cooperate specification revealed
Content is not intended to limit the invention enforceable qualifications, Ren Hejie so that those skilled in the art understands and reads
The modification of structure, the change of proportionate relationship or the adjustment of size are not influencing the effect of present invention can be generated and can reach
Under purpose, should all still it fall in the range of disclosed technology contents can cover.
Meanwhile cited such as "upper" in this specification, "lower", "left", "right", " centre " and " one " term, also
Only being illustrated convenient for narration, rather than to limit the scope of the invention, relativeness is altered or modified, in nothing
Under essence change technology contents, when being also considered as the enforceable scope of the present invention.
Air-flow of the present invention spreads felt equipment, planisher, vacuum sintering furnace, bubble point detector and nondestructive testing instrument, lamp inspection
Platform is the prior art.
Embodiment 1
The invention discloses a kind of preparation methods of superhigh precision fibrofelt, comprising the following steps:
String diameter is 2 μm by step 1), the superfine fibre that core number is 15000 cores is combineeed；
Superfine fibre after combining in step 1) is carried out the paved ultra-fine fibre web of formation of nonwoven using air-flow paving felt equipment by step 2；
Step 3) carries out uniformity testing to the ultra-fine fibre web in step 2；
Step 4) is using examining qualified ultra-fine fibre web and crude fibre net production fiber felt blanket in step 3), wherein crude fibre net
Filtering accuracy is 40 ~ 100 μm, and wherein the total substance of fiber felt blanket is 950 ~ 1000g/m2；
Step 5) rolls the fiber felt blanket in step 4) in planisher；
Fiber felt blanket after step 6) rolls step 5) is separated with separation layer, is sent into vacuum sintering furnace and is diffused welding；
Sintered fiber felt blanket is carried out thick smooth rear vacuum sintering furnace of being sent into and continues double sintering by step 7)；
Step 8) is smooth by the fiber felt blanket progress of double sintering in step 7), with a thickness of 0.4 ~ 0.5mm, the specification of fiber felt blanket
Including 3 μm of fiber felt blankets and 5 μm of fiber felt blankets, its bubble point pressure and gas permeability are measured using bubble point detector and nondestructive testing instrument
Energy；
Step 9) is welded as chimney filter after the fiber felt blanket in step 8) is carried out folding wave, carries out bubble point detection after folding wave to it and meets
It is required that being superhigh precision fibrofelt.
Embodiment 2
The invention discloses a kind of preparation methods of superhigh precision fibrofelt, comprising the following steps:
String diameter is 2 μm by step 1), the superfine fibre that core number is 15000 cores is combineeed；
Superfine fibre after combining in step 1) is carried out the paved ultra-fine fibre web of formation of nonwoven using air-flow paving felt equipment by step 2；
Step 3) carries out uniformity testing to the ultra-fine fibre web in step 2；
Step 4) is using examining qualified ultra-fine fibre web and crude fibre net production fiber felt blanket in step 3), wherein crude fibre net
Filtering accuracy is 40 ~ 100 μm, and wherein the total substance of fiber felt blanket is 950 ~ 1000g/m2；
Step 5) rolls the fiber felt blanket in step 4) in planisher；
Fiber felt blanket after step 6) rolls step 5) is separated with separation layer, is sent into vacuum sintering furnace and is diffused welding；
Sintered fiber felt blanket is carried out thick smooth rear vacuum sintering furnace of being sent into and continues double sintering by step 7)；
Step 8) is smooth by the fiber felt blanket progress of double sintering in step 7), with a thickness of 0.4 ~ 0.5mm, the specification of fiber felt blanket
Including 3 μm of fiber felt blankets and 5 μm of fiber felt blankets, its bubble point pressure and gas permeability are measured using bubble point detector and nondestructive testing instrument
Energy；
Step 9) is welded as chimney filter after the fiber felt blanket in step 8) is carried out folding wave, carries out bubble point detection after folding wave to it and meets
It is required that being superhigh precision fibrofelt.
Preferably, the number of share of stock combineeed in the step 1) is 4 ~ 8 strands, and grammes per square metre is 6 ~ 9g/m.
Preferably, the licker-in speed of air-flow paving felt equipment is 1200 ~ 1500RPM in the step 2, and air-flow spreads felt equipment
Feeding roller speed be 60 ~ 90RPM, paved ultra-fine fibre web grammes per square metre be 50 ~ 100g/m2。
Preferably, in the step 3) uniformity testing the following steps are included:
Step 3-1) paved ultra-fine fibre web is placed in lamp inspection desk, uniformity is judged by translucency；Step 3-2) in ultra-fine fibre
It is the disk of Φ 60mm that the length and wide direction of net, which respectively take 6 diameters, measures substance, compares, substance deviation is in ± 5% range
Interior is qualification.
Embodiment 3
The invention discloses a kind of preparation methods of superhigh precision fibrofelt, comprising the following steps:
String diameter is 2 μm by step 1), the superfine fibre that core number is 15000 cores is combineeed；
Superfine fibre after combining in step 1) is carried out the paved ultra-fine fibre web of formation of nonwoven using air-flow paving felt equipment by step 2；
Step 3) carries out uniformity testing to the ultra-fine fibre web in step 2；
Step 4) is using examining qualified ultra-fine fibre web and crude fibre net production fiber felt blanket in step 3), wherein crude fibre net
Filtering accuracy is 40 ~ 100 μm, and wherein the total substance of fiber felt blanket is 950 ~ 1000g/m2；
Step 5) rolls the fiber felt blanket in step 4) in planisher；
Fiber felt blanket after step 6) rolls step 5) is separated with separation layer, is sent into vacuum sintering furnace and is diffused welding；
Sintered fiber felt blanket is carried out thick smooth rear vacuum sintering furnace of being sent into and continues double sintering by step 7)；
Step 8) is smooth by the fiber felt blanket progress of double sintering in step 7), with a thickness of 0.4 ~ 0.5mm, the specification of fiber felt blanket
Including 3 μm of fiber felt blankets and 5 μm of fiber felt blankets, its bubble point pressure and gas permeability are measured using bubble point detector and nondestructive testing instrument
Energy；
Step 9) is welded as chimney filter after the fiber felt blanket in step 8) is carried out folding wave, carries out bubble point detection after folding wave to it and meets
It is required that being superhigh precision fibrofelt.
Preferably, the number of share of stock combineeed in the step 1) is 4 ~ 8 strands, and grammes per square metre is 6 ~ 9g/m.
Preferably, the licker-in speed of air-flow paving felt equipment is 1200 ~ 1500RPM in the step 2, and air-flow spreads felt equipment
Feeding roller speed be 60 ~ 90RPM, paved ultra-fine fibre web grammes per square metre be 50 ~ 100g/m2。
Preferably, in the step 3) uniformity testing the following steps are included:
Step 3-1) paved ultra-fine fibre web is placed in lamp inspection desk, uniformity is judged by translucency；Step 3-2) in ultra-fine fibre
It is the disk of Φ 60mm that the length and wide direction of net, which respectively take 6 diameters, measures substance, compares, substance deviation is in ± 5% range
Interior is qualification.
Preferably, fiber felt blanket is made of the ultra-fine fibre web of multilayer and the overlapping of multilayer crude fibre net in the step 4), wherein
Multilayer crude fibre net is set to two sides outer layer, and wherein the ultra-fine fibre web of multilayer is set to internal layer, the crude fibre net and ultra-fine fibre web
Number of plies ratio be 4:6.
Preferably, the vacuum degree of vacuum sintering furnace is 5.0 × 10 in the step 6)-2Pa, sintering temperature are 1020 ~ 1050
DEG C, and when being warming up to 900 DEG C with nitrogen air quenching.
Preferably, the vacuum degree of vacuum sintering furnace is 5.0 × 10 in the step 7)-2Pa, sintering temperature are 1120 ~ 1150
DEG C, and when being warming up to 900 DEG C with nitrogen air quenching.
Embodiment 4
The invention discloses a kind of preparation methods of superhigh precision fibrofelt, comprising the following steps:
String diameter is 2 μm by step 1), the superfine fibre that core number is 15000 cores is combineeed；
Superfine fibre after combining in step 1) is carried out the paved ultra-fine fibre web of formation of nonwoven using air-flow paving felt equipment by step 2；
Step 3) carries out uniformity testing to the ultra-fine fibre web in step 2；
Step 4) is using examining qualified ultra-fine fibre web and crude fibre net production fiber felt blanket in step 3), wherein crude fibre net
Filtering accuracy is 40 ~ 100 μm, and wherein the total substance of fiber felt blanket is 950 ~ 1000g/m2；
Step 5) rolls the fiber felt blanket in step 4) in planisher；
Fiber felt blanket after step 6) rolls step 5) is separated with separation layer, is sent into vacuum sintering furnace and is diffused welding；Every
Absciss layer is in close contact fiber felt blanket between layers, increases the quantity of overlapped points between fiber；
Sintered fiber felt blanket is carried out thick smooth rear vacuum sintering furnace of being sent into and continues double sintering by step 7)；
Step 8) is smooth by the fiber felt blanket progress of double sintering in step 7), with a thickness of 0.4 ~ 0.5mm, the specification of fiber felt blanket
Including 3 μm of fiber felt blankets and 5 μm of fiber felt blankets, its bubble point pressure and gas permeability are measured using bubble point detector and nondestructive testing instrument
Energy；
Step 9) is welded as chimney filter after the fiber felt blanket in step 8) is carried out folding wave, carries out bubble point detection after folding wave to it and meets
It is required that being superhigh precision fibrofelt.
Preferably, the number of share of stock combineeed in the step 1) is 4 ~ 8 strands, and grammes per square metre is 6 ~ 9g/m.
Preferably, the licker-in speed of air-flow paving felt equipment is 1200 ~ 1500RPM in the step 2, and air-flow spreads felt equipment
Feeding roller speed be 60 ~ 90RPM, paved ultra-fine fibre web grammes per square metre be 50 ~ 100g/m2。
Preferably, in the step 3) uniformity testing the following steps are included:
Step 3-1) paved ultra-fine fibre web is placed in lamp inspection desk, uniformity is judged by translucency；Step 3-2) in ultra-fine fibre
It is the disk of Φ 60mm that the length and wide direction of net, which respectively take 6 diameters, measures substance, compares, substance deviation is in ± 5% range
Interior is qualification.
Preferably, fiber felt blanket is made of the ultra-fine fibre web of multilayer and the overlapping of multilayer crude fibre net in the step 4), wherein
Multilayer crude fibre net is set to two sides outer layer, and wherein the ultra-fine fibre web of multilayer is set to internal layer, the crude fibre net and ultra-fine fibre web
Number of plies ratio be 4:6.
Preferably, the vacuum degree of vacuum sintering furnace is 5.0 × 10 in the step 6)-2Pa, sintering temperature are 1020 ~ 1050
DEG C, and when being warming up to 900 DEG C with nitrogen air quenching.
Preferably, the vacuum degree of vacuum sintering furnace is 5.0 × 10 in the step 7)-2Pa, sintering temperature are 1120 ~ 1150
DEG C, and when being warming up to 900 DEG C with nitrogen air quenching.
Preferably, in the step 8) as bubble point pressure≤10000Pa of manufactured 3 μm of fiber felt blankets, saturating gas energy≤
10L/min.dm2Shi Xingneng reaches requirement；As bubble point pressure≤7500Pa of manufactured 5 μm of fiber felt blankets, saturating gas energy≤
40L/min.dm2Shi Xingneng reaches requirement.
Preferably, the wave height that folding wave is carried out in the step 9) is 8mm, wave number 45,3 μm of fiber felt blankets after rolling over wave
It meets the requirements when bubble point pressure≤8000Pa, meets the requirements when bubble point pressure≤6000Pa of 5 μm of fiber felt blankets after rolling over wave.
Preferably, a kind of superhigh precision fibrofelt, the superhigh precision fibrofelt is by described in any item preparation sides as above
Method is made.
Embodiment 5
String diameter is 2 μm by step 1), core number is that 15000 core superfine fibres are combineeed, and number of share of stock is 4 strands, grammes per square metre 6g/m；
Step 2 is paved using air-flow paving felt equipment progress nonwoven to the superfine fibre after plying, and wherein licker-in speed is
1000RPM, feeding roller speed are 60RPM, and paved ultra-fine fibre web grammes per square metre is controlled in 50g/m2；
Step 3) tests to paved ultra-fine fibre web, first passes through lamp inspection desk and determines whole uniformity, then in ultra-fine fibre
The length-width direction of net respectively takes 6 disks, weighs respectively, and substance deviation is qualified in ± 5% range；
Step 4) makes fiber felt blanket, and total substance control is in 950g/m2, by the ultra-fine fibre web of multilayer and multilayer crude fibre net overlapping system
At fiber felt blanket, wherein multilayer crude fibre net is set to two sides outer layer, and wherein the ultra-fine fibre web of multilayer is set to internal layer, the thick fibre
The number of plies ratio for tieing up net and ultra-fine fibre web is 4:6；
Step 5) rolls fiber felt blanket using planisher；
Fiber felt blanket separation layer after step 6) rolls separates, and is sent into vacuum sintering furnace and is diffused welding, carries out for the first time
Sintering, vacuum degree control is 5.0 × 10-2Within Pa, sintering temperature is controlled at 1020 DEG C, at 900 DEG C with nitrogen air quenching；
Step 7) is thick smooth by the fiber felt blanket progress of first sintering, then carries out secondary vacuum sintering, vacuum degree control exists
5.0×10-2Within Pa, sintering temperature is controlled at 1120 DEG C, at 900 DEG C with nitrogen air quenching；
The fiber felt blanket that secondary vacuum is sintered by step 8) is smooth to 0.4mm, detects the bubble point pressure and gas permeability of fiber felt blanket
Can, wherein bubble point pressure≤10000Pa, saturating gas energy≤10L/min.dm2, belong to 3 μm of fiber felt blankets, performance indicator, which reaches, to be wanted
It asks；
Step 9) is welded as chimney filter after fiber felt blanket is carried out folding wave, wherein the wave height for carrying out folding wave is 8mm, wave number 45, folding
Bubble point detection is carried out after wave to it, bubble point pressure≤8000Pa of fiber felt blanket after wave is rolled over, meets the requirements.
Embodiment 6
String diameter is 2 μm by step 1), core number is that 15000 core superfine fibres are combineeed, and number of share of stock is 8 strands, grammes per square metre 9g/m；
Step 2 is paved using air-flow paving felt equipment progress nonwoven to the superfine fibre after plying, and wherein licker-in speed is
1500RPM, feeding roller speed are 90RPM, and paved ultra-fine fibre web grammes per square metre is controlled in 100g/m2；
Step 3) tests to paved ultra-fine fibre web, first passes through lamp inspection desk and determines whole uniformity, then in ultra-fine fibre
The length-width direction of net respectively takes 6 disks, weighs respectively, and substance deviation is qualified in ± 5% range；
Step 4) makes fiber felt blanket, and total substance control is in 1000g/m2, the ultra-fine fibre web of multilayer and multilayer crude fibre net are overlapped
Fiber felt blanket is made, wherein multilayer crude fibre net is set to two sides outer layer, and wherein the ultra-fine fibre web of multilayer is set to internal layer, described thick
The number of plies ratio of web and ultra-fine fibre web is 4:6；
Step 5) rolls fiber felt blanket using planisher；
Fiber felt blanket separation layer after step 6) rolls separates, and is sent into vacuum sintering furnace and is diffused welding, carries out for the first time
Sintering, vacuum degree control is 5.0 × 10-2Within Pa, sintering temperature is controlled at 1050 DEG C, at 900 DEG C with nitrogen air quenching；
Step 7) is thick smooth by the fiber felt blanket progress of first sintering, then carries out secondary vacuum sintering, vacuum degree control exists
5.0×10-2Within Pa, sintering temperature is controlled at 1150 DEG C, at 900 DEG C with nitrogen air quenching；
The fiber felt blanket that secondary vacuum is sintered by step 8) is smooth to 0.5mm, detects the bubble point pressure and gas permeability of fiber felt blanket
Can, wherein bubble point pressure≤7500Pa, saturating gas energy≤40L/min.dm2, belong to 5 μm of fiber felt blankets, performance indicator, which reaches, to be wanted
It asks；
Step 9) is welded as chimney filter after fiber felt blanket is carried out folding wave, wherein the wave height for carrying out folding wave is 8mm, wave number 45, folding
Bubble point detection is carried out after wave to it, bubble point pressure≤6000Pa of fiber felt blanket after wave is rolled over, meets the requirements.
Embodiment 7
String diameter is 2 μm by step 1), core number is that 15000 core superfine fibres are combineeed, and number of share of stock is 6 strands, grammes per square metre 8g/m；
Step 2 is paved using air-flow paving felt equipment progress nonwoven to the superfine fibre after plying, and wherein licker-in speed is
1300RPM, feeding roller speed are 80RPM, and paved ultra-fine fibre web grammes per square metre is controlled in 80g/m2；
Step 3) tests to paved ultra-fine fibre web, first passes through lamp inspection desk and determines whole uniformity, then in ultra-fine fibre
The length-width direction of net respectively takes 6 disks, weighs respectively, and substance deviation is qualified in ± 5% range；
Step 4) makes fiber felt blanket, and total substance control is in 980g/m2, by the ultra-fine fibre web of multilayer and multilayer crude fibre net overlapping system
At fiber felt blanket, wherein multilayer crude fibre net is set to two sides outer layer, and wherein the ultra-fine fibre web of multilayer is set to internal layer, the thick fibre
The number of plies ratio for tieing up net and ultra-fine fibre web is 4:6；
Step 5) rolls fiber felt blanket using planisher；
Fiber felt blanket separation layer after step 6) rolls separates, and is sent into vacuum sintering furnace and is diffused welding, carries out for the first time
Sintering, vacuum degree control is 5.0 × 10-2Within Pa, sintering temperature is controlled at 1030 DEG C, at 900 DEG C with nitrogen air quenching；
Step 7) is thick smooth by the fiber felt blanket progress of first sintering, then carries out secondary vacuum sintering, vacuum degree control exists
5.0×10-2Within Pa, sintering temperature is controlled at 1130 DEG C, at 900 DEG C with nitrogen air quenching；
The fiber felt blanket that secondary vacuum is sintered by step 8) is smooth to 0.5mm, detects the bubble point pressure and gas permeability of fiber felt blanket
Can, wherein bubble point pressure≤10000Pa, saturating gas energy≤10L/min.dm2, belong to 3 μm of fiber felt blankets, performance indicator, which reaches, to be wanted
It asks；
Step 9) is welded as chimney filter after fiber felt blanket is carried out folding wave, wherein the wave height for carrying out folding wave is 8mm, wave number 45, folding
Bubble point detection is carried out after wave to it, bubble point pressure≤8000Pa of fiber felt blanket after wave is rolled over, meets the requirements.
Superhigh precision fibrofelt permeability prepared by the present invention, bubble point pressure can reach requirement, and superfine fibre carries out
Ultra-fine fibre net homogeneity after air-flow method is paved is consistent, and product quality is controllable, and the fiber felt blanket after high temperature sintering is whole
Body fastness is reliable, and it is not easy to break can to roll over wave.
For making thin-film material filter element for filtration, filtering accuracy can achieve superhigh precision fibrofelt produced by the present invention
3 μm, 5 μm, bubble point pressure respectively reaches 10000Pa, 7500Pa, and air permeability respectively reaches 10L/min.dm2、40L/
min.dm2, bubble point pressure respectively reaches 8000Pa, 6000Pa after rolling over wave, and even aperture distribution solves the paved of superfine fibre
With mass high temperature sintering problem.
Preparation method rational technology of the present invention, it is simple to operation, it reduces costs simultaneously, provides production efficiency, can use
In batch production.
The preferred embodiment for the present invention is explained in detail above, but the present invention is not limited to the above embodiments,
Those of ordinary skill in the art within the scope of knowledge, can also make various without departing from the purpose of the present invention
Variation.
Many other changes and remodeling can be made by not departing from the spirit and scope of the present invention.It should be appreciated that the present invention is not
It is limited to specific embodiment, the scope of the present invention is defined by the following claims.
Claims (10)
1. a kind of preparation method of superhigh precision fibrofelt, which comprises the following steps:
String diameter is 2 μm by step 1), the superfine fibre that core number is 15000 cores is combineeed；
Superfine fibre after combining in step 1) is carried out the paved ultra-fine fibre web of formation of nonwoven using air-flow paving felt equipment by step 2；
Step 3) carries out uniformity testing to the ultra-fine fibre web in step 2；
Step 4) is using examining qualified ultra-fine fibre web and crude fibre net production fiber felt blanket in step 3), wherein crude fibre net
Filtering accuracy is 40 ~ 100 μm, and wherein the total substance of fiber felt blanket is 950 ~ 1000g/m2；
Step 5) rolls the fiber felt blanket in step 4) in planisher；
Fiber felt blanket after step 6) rolls step 5) is separated with separation layer, is sent into vacuum sintering furnace and is diffused welding；
Sintered fiber felt blanket is carried out thick smooth rear vacuum sintering furnace of being sent into and continues double sintering by step 7)；
Step 8) is smooth by the fiber felt blanket progress of double sintering in step 7), with a thickness of 0.4 ~ 0.5mm, the specification of fiber felt blanket
Including 3 μm of fiber felt blankets and 5 μm of fiber felt blankets, its bubble point pressure and gas permeability are measured using bubble point detector and nondestructive testing instrument
Energy；
Step 9) is welded as chimney filter after the fiber felt blanket in step 8) is carried out folding wave, carries out bubble point detection after folding wave to it and meets
It is required that being superhigh precision fibrofelt.
2. a kind of preparation method of superhigh precision fibrofelt according to claim 1, it is characterised in that: in the step 1)
The number of share of stock of plying is 4 ~ 8 strands, and grammes per square metre is 6 ~ 9g/m.
3. a kind of preparation method of superhigh precision fibrofelt according to claim 1, it is characterised in that: in the step 2
The licker-in speed that air-flow spreads felt equipment is 1200 ~ 1500RPM, and the feeding roller speed that air-flow spreads felt equipment is 60 ~ 90RPM, paved
Ultra-fine fibre web grammes per square metre be 50 ~ 100g/m2。
4. a kind of preparation method of superhigh precision fibrofelt according to claim 1, which is characterized in that in the step 3)
Uniformity testing the following steps are included:
Step 3-1) paved ultra-fine fibre web is placed in lamp inspection desk, uniformity is judged by translucency；Step 3-2) in ultra-fine fibre
It is the disk of Φ 60mm that the length and wide direction of net, which respectively take 6 diameters, measures substance, compares, substance deviation is in ± 5% range
Interior is qualification.
5. a kind of preparation method of superhigh precision fibrofelt according to claim 1, it is characterised in that: in the step 4)
Fiber felt blanket is made of the ultra-fine fibre web of multilayer and the overlapping of multilayer crude fibre net, and wherein multilayer crude fibre net is set to two sides outer layer,
Wherein the ultra-fine fibre web of multilayer is set to internal layer, and the number of plies ratio of the crude fibre net and ultra-fine fibre web is 4:6.
6. a kind of preparation method of superhigh precision fibrofelt according to claim 1, it is characterised in that: in the step 6)
The vacuum degree of vacuum sintering furnace is 5.0 × 10-2Pa, sintering temperature is 1020 ~ 1050 DEG C, and the nitrogen when being warming up to 900 DEG C
Air quenching.
7. a kind of preparation method of superhigh precision fibrofelt according to claim 1, it is characterised in that: in the step 7)
The vacuum degree of vacuum sintering furnace is 5.0 × 10-2Pa, sintering temperature is 1120 ~ 1150 DEG C, and the nitrogen when being warming up to 900 DEG C
Air quenching.
8. a kind of preparation method of superhigh precision fibrofelt according to claim 1, it is characterised in that: in the step 8)
As bubble point pressure≤10000Pa of manufactured 3 μm of fiber felt blankets, saturating gas energy≤10L/min.dm2Shi Xingneng reaches requirement；When
Bubble point pressure≤7500Pa of manufactured 5 μm of fiber felt blankets, saturating gas energy≤40L/min.dm2Shi Xingneng reaches requirement.
9. a kind of preparation method of superhigh precision fibrofelt according to claim 1, it is characterised in that: in the step 9)
The wave height for carrying out folding wave is 8mm, and wave number 45 meets the requirements when bubble point pressure≤8000Pa of 3 μm of fiber felt blankets after rolling over wave,
It meets the requirements when bubble point pressure≤6000Pa of 5 μm of fiber felt blankets after rolling over wave.
10. a kind of superhigh precision fibrofelt, it is characterised in that: the superhigh precision fibrofelt is by any one of claim 1 ~ 9 institute
The preparation method stated is made.
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