CN103966887B - A kind of poor method in paper two sides and paper of preparation thereof of reducing - Google Patents
A kind of poor method in paper two sides and paper of preparation thereof of reducing Download PDFInfo
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- CN103966887B CN103966887B CN201410166560.4A CN201410166560A CN103966887B CN 103966887 B CN103966887 B CN 103966887B CN 201410166560 A CN201410166560 A CN 201410166560A CN 103966887 B CN103966887 B CN 103966887B
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Abstract
The invention provides a kind of poor method in paper two sides that reduces. Paper is designed to multi-layer fiber layer structure, every layer of standby slurry, making beating independently; Slurry enters the paper machine of multiple independent runners, the stacked shaping of manufacturing paper with pulp simultaneously in shaping district, wherein enter diameter in the slurry I of runner of next-door neighbour's forming net and be less than the fines content of 1 μ m higher than the described fines content of other each layer slurry, preferred high by 5～10%. The paper that the present invention also provides the low two sides of being prepared by said method to differ from, the all-glass paper that especially low two sides is poor, and the coagulation type filter element of the all-glass paper differing from containing described low two sides. The poor all-glass paper in low two sides provided by the invention, fiber, at paper sheet thickness direction even density, can significantly improve efficiency and the separating power of coagulation type filter core.
Description
Technical field
The invention belongs to field of papermaking, be specifically related to a kind of reduce paper two sides poor method and preparation thereofThe poor paper in low two sides.
Background technology
In the wet-formed process of papermaking, owing to being subject to the effect of vacuum force, approaching papermakingThat side of shape net, fine fibre easily runs off through the hole of forming net along current, makes pageLower than opposite side, cause obvious two sides poor phenomenon, namely paper in the fines content of forming net sideOn page thickness direction, fiber uniformity coefficient there are differences. For the high paper of fines content, for example highPrecision filter paper, battery diaphragm etc., the poor phenomenon in this two sides is more remarkable. This is for high-performance paperApplication in fields such as filtration, separation has caused material impact.
For example, the coagulation type filter separating with liquid-liquid for gas-liquid separation, filter core uses many conventionallyThe glass fiber filter paper of layer wound form. Liquid particle to be removed can be tackled by diameter, inertia hitsHit or the mode of Brownian movement is tackled by the glass fibre of thin diameter. Once drop coalescent on fiber becomesMust be enough large, by viscous force and the drop Action of Gravity Field of the filter paper of flowing through, drop is from fiber filter paper surfaceThereby drop separated, collection.
Above-mentioned glass fiber filter paper is taking glass fibre as raw material, by the mode system of wet papermakingMake. In general, glass fibre is divided into glass chopped silk according to fibre diameter and (adopts melting to drawThe manufacture of silk method, fibre diameter is more than or equal to 6 μ m) and microglass fiber (adopts flame blowing methodManufacture, average fibre diameter is less than 3 μ m); In microglass fiber, average fibre diameter is greater than etc.In 1 μ m be called raw glass cotton fiber, what average fibre diameter was less than 1 μ m is called fine glass wool fibreDimension. In the time of paper sheet formation, in that side near paper making forming net, small fine glass wool fiber justEasily be subject to the effect of vacuum force and run off, making the fine glass wool fiber of page in forming net sideContent, lower than opposite side, causes the poor phenomenon in obvious two sides. For which floor thering is to tens layers glass fibersThe filter core of the coagulation type filter of dimension filter paper, if all there is two sides in every glass fiber filter paperPoor, along with the increase of the filter paper number of plies, the difference of the fiber uniformity of this paper sheet thickness direction will be expandedGreatly, thereby cause fluid cannot remain unanimously to going out stream interface agglutinating power from entering stream interface, impact filterCore is brought into play excellent coalescent and separative efficiency in the confined space.
Therefore, the high-precision filtration taking coagulation type filter core as representative, to the uniformity of paper sheet thickness directionVery high requirement has been proposed. But published technical literature, rarely has and pays close attention to the equal of page thickness directionThe poor method of even property and elimination paper two sides.
Chinese utility model patent (notification number CN203284679U, November 13 2013 day for announcingDay) a kind of top net former of the otherness that can regulate paper two sides disclosed. By arranging solelyVertical top net suction box and spacer screen suction box regulate page dehydrating amount up and down, and then improveThe otherness of page both sides outward appearance, but fibrous still variant on whole page thickness direction, allEven property problem is not resolved.
Summary of the invention
For the problems referred to above, one object of the present invention is to provide a kind of poor side, paper two sides that reducesMethod, makes paper, especially glass fiber filter paper fibrous more uniformity in paper sheet thickness direction;Thereby promote the coalescent and separating property of multi-lay winding coagulation type filter core.
In order to realize foregoing invention object, the present invention has adopted following technical scheme:
Reduce the poor method in paper two sides, paper is designed to multi-layer fiber layer structure, every layer of independenceThe standby slurry in ground, making beating; Slurry enters the paper machine of multiple independent runners, shaping district stacked manufacturing paper with pulp of whileBe shaped, wherein enter the content that diameter in the slurry I of runner of next-door neighbour's forming net is less than the fine fibre of 1 μ mHigher than the described fines content of other each layer of slurry.
Preferably, the content of fine fibre described in slurry I contains than the described fine glass fibre dimension of other each layer of slurryMeasure high by 5～10%.
Preferably, before manufacturing paper with pulp, also comprise the rectification of slurry, make slurry present flowing of high-strength micro-turbulenceState.
Preferably, the kinds of fibers of every layer of slurry is identical; Preferred, except described slurry I, otherFibrous and the weight proportion of each layer of slurry is identical.
As of the present invention one preferred embodiment, the fibrous of every layer of slurry is alkali-free glass fibreTie up short chopping, organic binder bond and contain the microglass fiber that diameter is less than the fine glass wool fiber of 1 μ m,In described slurry I, the content of fine glass wool fiber is higher than the fine glass wool fiber content of other each layer of slurry,Further preferably high by 5～10%.
Preferably, described microglass fiber also comprises that diameter is more than or equal to 1 μ m but is less than the thick glass of 3 μ mGlass cotton fiber.
Preferably, described microglass fiber is selected from borate glass cotton fiber or alkali-free glass cotton fiber. ;
In above-mentioned preferred embodiment, preferred, when standby slurry, taking every layer of fiber gross dry weight amount as baseStandard, the percentage by weight of various fibers is:
The short chopping 15～25% of alkali-free glass fibre, raw glass cotton fiber 0～65%, fine glass wool fiber10～65%, organic binder bond 5～10%; Wherein, the content ratio of fine glass wool fiber in described slurry IThe fine glass wool fiber content of other each layer of slurry is high, further preferably high by 5～10%.
Preferably, the formula of described other each layer of slurry is identical.
Further preferred, when standby slurry, taking every layer of fiber gross dry weight amount as benchmark, the weight of various fibersAmount percentage is:
The short chopping 15～25% of alkali-free glass fibre, raw glass cotton fiber 40～60%, fine glass wool fiber15～30%, organic binder bond 5～10%; Wherein, the content ratio of fine glass wool fiber in described slurry IThe fine glass wool fiber content of other each layer of slurry is high, further preferably high by 5～10%.
Preferably, the formula of described other each layer of slurry is identical.
Another object of the present invention is to provide a kind of low two sides poor paper, has multi-layer fiber layer knotStructure, prepares by said method, and wherein, ground floor is caused near forming net behaviour by described slurry IShape.
The present invention also provides a kind of low two sides poor all-glass paper, has multi-layer fiber layer structure, whereinGround floor causes shape by the slurry I behaviour of the runner that enters next-door neighbour's forming net; The fibrous of every layer of slurry isThe short chopping of alkali-free glass fibre, organic binder bond and contain the fine glass wool fiber that diameter is less than 1 μ mMicroglass fiber; In described slurry I, the content of fine glass wool fiber is than the thin glass of other each layer of slurryCotton fiber content is high, further preferably high by 5～10%.
Preferably, described microglass fiber also comprises that diameter is more than or equal to 1 μ m but is less than the thick glass of 3 μ mGlass cotton fiber.
Preferably, described microglass fiber is selected from borate glass cotton fiber or alkali-free glass cotton fiber.
In above-mentioned preferred embodiment, preferred, when standby slurry, taking each layer of fiber gross dry weight amount as baseStandard, the percentage by weight of various fibers is:
The short chopping 15～25% of alkali-free glass fibre, raw glass cotton fiber 0～65%, fine glass wool fiber10～65%, organic binder bond 5～10%; Wherein, the content ratio of fine glass wool fiber in described slurry IThe fine glass wool fiber content of other each layer of slurry is high, further preferably high by 5～10%.
Preferably, the formula of described other each layer of slurry is identical.
Further preferred, when standby slurry, taking every layer of fiber gross dry weight amount as benchmark, the weight of various fibersAmount percentage is:
The short chopping 15～25% of alkali-free glass fibre, raw glass cotton fiber 40～60%, fine glass wool fiber15～30%, organic binder bond 5～10%; In described slurry I, the content of fine glass wool fiber is more each than otherThe fine glass wool fiber content of layer slurry is high, further preferably high by 5～10%.
Preferably, the formula of described other each layer of slurry is identical.
In above-mentioned preferred embodiment, preferred, described ground floor accounts for the poor glass fibers in described low two sides15～30% of dimension paper gross weight, more preferably 20～25%.
A further object of the invention is to provide the poor all-glass paper in above-mentioned low two sides to filter in preparationApplication in device filter core; Preferably, described filter core is coagulation type filter core.
The present invention also provides a kind of coagulation type filter element, comprises the above-mentioned poor glass fibre in low two sidesPaper.
Organic binder bond of the present invention, can be selected from this area conventional, as acrylic resin, phenolic aldehydeResin etc.
The poor all-glass paper of the paper that low two sides of the present invention is poor and low two sides, the each layer of shaping of manufacturing paper with pulpBefore, paper pulp is diluted to conventional solid weight percent concentration; Manufacture paper with pulp be shaped after, also to pass through applying glue,The conventional step such as dry, curling. For the ease of regulating paper ventilation performance, low two sides of the present invention is poorAll-glass paper preferably add diameter to be greater than the raw glass cotton fiber of described fine glass wool fiber.
For the page that adopts traditional wet papermaking, in the time of paper sheet formation, near paper making forming netThat side, is subject to the effect of vacuum dehydration suction force, and it is easy that small diameter is less than the fine fibre of 1 μ mAlong current through the hole of forming net and run off, make page the fines content of forming net side lower thanOpposite side. What Fig. 1 showed is exactly in prior art, and the poor page fiber in two sides on forming net distributesSchematic diagram, wherein 1 represents the page being shaped, and 2 represent fine fibre, and 3 represent forming net. Near shapingThe density of the fine fibre 2 of net 3 sides is lower than the side away from forming net. Common coagulation type filter core, isThe poor all-glass paper in two sides that adopts above-mentioned art methods to prepare, obtains through multi-lay winding modeArrive. What Fig. 2 showed is the structural representation of described filter core, and wherein 4 represent that, into stream interface, 5 expressStream interface. As can be seen from Figure 2, fluid is from entering stream interface 4 to going out the process of stream interface 5, due to fiberDensity inhomogeneity, the agglutinating power of filter paper convection cell there will be fluctuation to rise and declines, and affects filter coreSeparating power.
The present invention adopts sandwich construction in the design of paper, and every layer of independence, for slurry, making beating, is passed through multiple flow passagesPaper making forming technology realize multilayer manufacture paper with pulp be simultaneously shaped dehydration; Exist near the slurry I in the runner of forming netIn formula, increase a certain proportion of fine fibre compared with the slurry in other runner. Like this, higher ratio in slurry IThe fine fibre of example can make up the fine fibre that when dehydration runs off, and fibrously between each layer approaches even oneCause, after making to be shaped, fine fibre ratio can great changes will take place on thickness direction for page, thereby reducePage two sides is poor. The fiber distribution schematic diagram of the page of the low two sides difference that the method for the invention preparesSee Fig. 3, wherein 1 represents the page being shaped, and 2 represent fine fibre, and 3 represent forming net. Page 1 thicknessIn direction, the distributing homogeneity of fine fibre 2 has obtained greatly improving. Prepare with the method for the inventionThe poor all-glass paper in low two sides obtaining, the structure of the coagulation type filter core obtaining in multi-lay winding mode is shownIntention, as shown in Figure 4, wherein 4 represent that, into stream interface, 5 express stream interface. As can be seen from Figure 4,Fluid is from entering stream interface 4 to going out the process of stream interface 5, and the density of fiber is consistent substantially, therefore, gramTake the fluctuation of common coagulation type filter core agglutinating power in prior art, improved the separating power of filter core.The result of test example 1 shows, adopts after the air compressor machine work 4000h of common coagulation type filter core lubricating oilLiquid level is down to below warning line, and air compressor machine cannot move with security and stability, need to again add lubricating oil.And use the low two sides that the inventive method is manufactured to differ from all-glass paper, make the coagulation type of same size sizeFilter, under equal conditions, the air compressor machine working time can reach 5000h, has reduced lubricating oil and has addedThe frequency adding. The poor all-glass paper in low two sides that the inventive method is manufactured is described, has effectively improved compression skyThe coalescence efficiency of lubricating oil drop in gas.
The multiple flow passages paper machine that the inventive method adopts, can adopt application for a patent for invention (publication numberCN103137931A, open day on June 5th, 2013) in disclosed structure. Make with the oblique net of three runnersPaper machine is example, and structural representation is shown in Fig. 5. The pulp distributor that wherein A is oblique net paper machine, pulp distributor A dividesFor three separate runners, represent with 1,2,3 respectively, slurry enters wherein and can not mixClose. B is the commutating zone of paper machine, is also divided into three runners, with runner 1,2 and the phase of pulp distributor ACoupling. The effect of commutating zone B is coming from a slurry rectification of pulp distributor A, produces high-strength micro-turbulenceFlow regime, does not produce eddy current, thereby makes the fluid stable of slurry, so just can ensure three layers of slurryIn being shaped, there is not to mix and obtain the good uniformity in material. Slurry is by after commutating zone BArrive the C place of drainage and formation district of oblique net paper machine, make to come from three layers of commutating zone B by vacuum dehydrationSlurry is at drainage and formation C district place's drainage and formation. Slurry I of the present invention enters the stream of pulp distributor ARoad 3, other slurry of each layer enters respectively runner 1 or 2. Like this, slurry I is shaped near forming net,The loss of fine fibre when its relatively high fines content has made up dehydration, thus make paper at thicknessIn direction, fiber is evenly distributed, and has reduced two sides poor.
Brief description of the drawings
Below, describe by reference to the accompanying drawings embodiment of the present invention in detail, wherein:
What Fig. 1 showed is in prior art, the poor page fiber distribution schematic diagram in two sides on forming net,Wherein 1 represents the poor page in two sides being shaped, and 2 represent fine fibre, and 3 represent forming net.
What Fig. 2 showed is adopts the structural representation of coagulation type filter core prepared by the poor all-glass paper in two sidesFigure, wherein 4 represent into stream interface, and 5 express stream interface, and the direction of arrow represents the current method of fluid.
What Fig. 3 showed is that the method for the invention prepares, the poor paper in low two sides on forming netPage fiber distribution map, wherein 1 represents the poor page in low two sides being shaped, and 2 represent fine fibre, and 3 representForming net.
What Fig. 4 showed is adopts the structural representation of coagulation type filter core prepared by the poor all-glass paper in low two sidesFigure, wherein 4 represent into stream interface, and 5 express stream interface, and the direction of arrow represents the current method of fluid.
What Fig. 5 showed is the structural representation of the oblique net paper machine of three runners, and wherein A represents oblique net paper machinePulp distributor, 1,2,3 represent three independent runners of pulp distributor A, B represents commutating zone, C tableBe shown as shape district, D represents the multi-ply paper after shaping.
Detailed description of the invention
Referring to specific embodiment, the present invention is described. It will be appreciated by those skilled in the art that theseEmbodiment is only for the present invention is described, the scope that it does not limit the present invention in any way.
Experimental technique in following embodiment, if no special instructions, is conventional method. Following enforcementMedicinal raw material, reagent material etc. used in example, if no special instructions, is commercially available purchase product.
Wherein, the short chopping diameter of alkali-free glass fibre is 6 μ m;
Borate raw glass cotton fiber average diameter is 2.6 μ m, and the trade mark is 475;
Alkali-free raw glass cotton fiber average diameter is 2.6 μ m;
Borate fine glass wool average fibre diameter is 0.8 μ m, and the trade mark is 475;
Alkali-free fine glass wool average fibre diameter is 0.8 μ m;
Needle-leaved wood fibre is flash drying kp softwood pulp;
Broad-leaved wood fiber is parrot Eucalyptus hardwood pulp;
Polyester fiber is spun gold guideboard PET fiber, fineness 1.67dtex, length 3mm;
Acrylic resin A ties up special material development corporation, Ltd. by Guangzhou five and produces, trade mark G408;
Acrylic resin B ties up special material development corporation, Ltd. by Guangzhou five and produces, trade mark PR3647;
Fluorocarbon resin is produced by Daikin fluorine chemical Co., Ltd, trade mark TG580.
Embodiment 1The poor all-glass paper in a kind of low two sides
The all-glass paper that low two sides is poor, quantitatively 85g/m2, formed by 2 layers of fibrage, by asBelow method prepares:
1. every layer is sent for slurry, stream respectively
Raw material is mixed, disperses, is diluted to solid weight percentage according to formula shown in table 1 with water denseDegree is 0.8%, obtains slurry I and slurry II, wherein containing of slurry I mesoboric acid salt fine glass wool fiberAmount is than slurry II many 7.5%;
2. the shaping of manufacturing paper with pulp
Slurry I and II are sent into respectively to the oblique net paper machine of multiple flow passages, and wherein slurry I enters near shaping districtRunner, the two-layer shaping of simultaneously manufacturing paper with pulp, through processed, applying glue, dry, curling, obtains orderMark product. The poor all-glass paper ground floor in described low two sides is shaped by slurry I, and the second layer is by slurry IIBe shaped.
Embodiment 2The poor all-glass paper in a kind of low two sides
The all-glass paper that low two sides is poor, quantitatively 85g/m2, formed by 3 layers of fibrage, by asBelow method prepares:
1. each layer is sent for slurry, stream respectively
Raw material is mixed, disperses, is diluted to solid weight percentage according to formula shown in table 1 with water denseDegree is 0.67%, obtains slurry I, slurry II and slurry III, wherein the thin glass of slurry I mesoboric acid saltThe content of cotton fiber is than slurry II and slurry III many 7.5%;
2. the shaping of manufacturing paper with pulp
Slurry I, II, III are sent into respectively to the oblique net paper machine of multiple flow passages, and wherein slurry I enters near one-tenthThe runner in shape district, the three layers of shaping of simultaneously manufacturing paper with pulp, through processed, applying glue, dry, curling, to obtain final productTo target product. The all-glass paper that described low two sides is poor, ground floor is shaped by slurry I, the second layer bySlurry II is shaped, and the 3rd layer is shaped by slurry III.
Embodiment 3The poor all-glass paper in a kind of low two sides
The all-glass paper that low two sides is poor, quantitatively 85g/m2, formed by 3 layers of fibrage, by asBelow method prepares:
1. each layer is sent for slurry, stream respectively
Prepare each raw material according to formula shown in table 1, then mix, disperse, be diluted to solid weight with waterAmount percent concentration is 0.67%, obtains slurry I, slurry II and slurry III, wherein nothing in slurry IThe content of alkali fine glass wool fiber is than slurry II and slurry III many 5%;
2. the shaping of manufacturing paper with pulp
Slurry I, II, III are sent into respectively to the oblique net paper machine of multiple flow passages, and wherein slurry I enters near one-tenthThe runner in shape district, the three layers of shaping of simultaneously manufacturing paper with pulp, through processed, applying glue, dry, curling, to obtain final productTo target product. The all-glass paper that described low two sides is poor, ground floor is shaped by slurry I, the second layer bySlurry II is shaped, and the 3rd layer is shaped by slurry III.
Embodiment 4The poor all-glass paper in a kind of low two sides
The all-glass paper that low two sides is poor, quantitatively 100g/m2, formed by 3 layers of fibrage, pass throughFollowing method prepares:
1. each layer is sent for slurry, stream respectively
Prepare each raw material according to formula shown in table 1, then mix, disperse, be diluted to solid weight with waterAmount percent concentration is 0.67%, obtains slurry I, slurry II and slurry III, wherein nothing in slurry IThe content of alkali fine glass wool fiber is than slurry II and slurry III many 10%;
2. the shaping of manufacturing paper with pulp
Slurry I, II, III are sent into respectively to the oblique net paper machine of multiple flow passages, and wherein slurry I enters near one-tenthThe runner in shape district, the three layers of shaping of simultaneously manufacturing paper with pulp, through processed, applying glue, dry, curling, to obtain final productTo target product. The all-glass paper that described low two sides is poor, ground floor is shaped by slurry I, the second layer bySlurry II is shaped, and the 3rd layer is shaped by slurry III.
The fiber dry weight formula (percentage by weight, %) of table 1 embodiment 1-4
Embodiment 5The poor engine air filter paper in a kind of low two sides
The engine air filter paper that low two sides is poor, quantitatively 120g/m2, formed by 3 layers of fibrage, logicalCrossing following method prepares:
1. each layer is sent for slurry, stream respectively
Prepare each raw material according to formula shown in table 2, then mix, disperse, be diluted to solid weight with waterAmount percent concentration is 2.0%, obtains slurry I, slurry II and slurry III, wherein alkali-free in slurry IThe content of fine glass wool fiber is than slurry II and slurry III many 5%;
2. the shaping of manufacturing paper with pulp
Slurry I, II, III are sent into respectively to the oblique net paper machine of multiple flow passages, and wherein slurry I enters near one-tenthThe runner in shape district, the three layers of shaping of simultaneously manufacturing paper with pulp, through processed, front dry, applying glue, after dry,Curling, obtain target product. The poor engine air filter paper in described low two sides, ground floor is become by slurry IShape, the second layer is shaped by slurry II, and the 3rd layer is shaped by slurry III.
The fiber dry weight formula (percentage by weight, %) of table 2 embodiment 5
Embodiment 6A kind of coagulation type filter core
The poor all-glass paper in low two sides of embodiment 2 and embodiment 3, according to this area usual manner,The glass fiber filter paper of embodiment 2 is first wound around 10 layers, then twines by the glass fiber filter paper of embodiment 3Around 4 layers, prepare multi-lay winding formula coagulation type filter core, filter core is cylindrical shape, internal diameter Φ 110mm,External diameter Φ 150mm, height 200mm.
Test example 1The performance test of coagulation type filter core
Tested object:
1) the coagulation type filter core that prepared by the poor all-glass paper in low two sides of the present invention is (hereinafter to be referred as " lowThe poor filter core in two sides "): prepared by embodiment 6
2) the coagulation type filter core that in prior art prepared by the poor all-glass paper in two sides is (hereinafter to be referred as " two sidesPoor filter core "): cylindrical shape filter core, internal diameter Φ 110mm, external diameter Φ 150mm, height 200mm, according toThis area usual manner, uses H&V company of the U.S. 1399 model glass fiber filter paper to be first wound around 10 layers,Then be wound around 4 layers by H&V company of the U.S. 1477 model glass fiber filter paper.
Method of testing:
To the fuel injection type screw rod air compressor of above-mentioned tested object be housed, be 37kW, work at power of motorPressure is that 0.8MPa, volume flow are 6m3/ min, lubricating oil are that shell really can be stood S3R's (46#)Under condition, continuous operation, records lubricating oil potential drop to the working time below warning line.
Test result:
1) the poor filter core in low two sides: 5000 hours
2) the poor filter core in two sides: 4000 hours
Conclusion:
The all-glass paper that low two sides of the present invention is poor, due to the thickness direction fibre density at paper moreEvenly, can significantly improve coalescence efficiency, promote the separating power of coagulation type filter core.
In a word, the invention provides a kind of method that reduces paper two sides difference, and the low two sides of preparing thusPoor paper, the particularly poor all-glass paper in low two sides. By the method for the invention, paper is existedThe distribution of thickness direction fiber is more even. Prepared by the poor all-glass paper in low two sides provided by the inventionMulti-lay winding formula coagulation type filter core, can avoid the coalescent energy of convection cell causing because of fibre density skewnessThe fluctuation of power. Experiment showed, that the poor all-glass paper in low two sides of the present invention can significantly improve coalescentThe efficiency of formula filter core and separating power.
Specific description of embodiments of the present invention above does not limit the present invention, and those skilled in the art canTo make various changes or distortion according to the present invention, only otherwise depart from spirit of the present invention, all should belong to thisThe scope of invention claims.
Claims (18)
1. reduce the poor method in paper two sides, it is characterized in that, paper is designed to multi-layer fiber layerStructure, the kinds of fibers of every layer of slurry is identical, every layer of standby slurry, making beating independently; Slurry has entered multipleThe paper machine of independent runner, the stacked shaping of manufacturing paper with pulp simultaneously in shaping district, wherein enters the stream that is close to forming netIn the slurry I in road, diameter is less than the fines content of 1 μ m than the described fines content of other each layer of slurryHigh by 5～10%; Before manufacturing paper with pulp, also comprise the rectification of slurry, make slurry present the mobile shape of high-strength micro-turbulenceState.
2. method according to claim 1, is characterized in that, except described slurry I, otherFibrous and the weight proportion of each layer of slurry is identical.
3. want the method described in 2 according to right, it is characterized in that, the fibrous of every layer of slurry is nothingThe short chopping of alkali containing glass fibre, organic binder bond and contain the fine glass wool fiber that diameter is less than 1 μ mMicroglass fiber, in described slurry I, the content of fine glass wool fiber is than the fine glass wool of other each layer of slurryFiber content is high by 5～10%.
4. want the method described in 3 according to right, it is characterized in that, described microglass fiber also comprises directlyFootpath is more than or equal to 1 μ m but is less than the raw glass cotton fiber of 3 μ m.
5. want the method described in 3 according to right, it is characterized in that, described microglass fiber is selected from boric acidSalt microglass fiber or alkali-free glass cotton fiber.
6. method according to claim 3, is characterized in that, when standby slurry, with every layer of fiberGross dry weight amount is benchmark, and the percentage by weight of various fibers is:
The short chopping 15～25% of alkali-free glass fibre, raw glass cotton fiber 0～65%, fine glass wool fiber10～65%, organic binder bond 5～10%; Wherein, the content ratio of fine glass wool fiber in described slurry IThe fine glass wool fiber content of other each layer of slurry is high by 5～10%; The formula phase of described other each layer of slurryWith.
7. want the method described in 6 according to right, it is characterized in that, when standby slurry, always dry with every layer of fiberWeight is benchmark, and the percentage by weight of various fibers is:
The short chopping 15～25% of alkali-free glass fibre, raw glass cotton fiber 40～60%, fine glass wool fiber15～30%, organic binder bond 5～10%; In described slurry I, the content of fine glass wool fiber is more each than otherThe fine glass wool fiber content of layer slurry is high by 5～10%; The formula of described other each layer of slurry is identical.
8. the poor paper in low two sides, has multi-layer fiber layer structure, by claim 1 to 7Method described in any one prepares, and wherein, ground floor is caused near forming net behaviour by described slurry IShape.
9. the poor all-glass paper in low two sides, has multi-layer fiber layer structure, wherein ground floor byThe slurry I behaviour who enters the runner of next-door neighbour's forming net causes shape; The fibrous of every layer of slurry is alkali-free glassThe short chopping of fiber, organic binder bond and contain the mineral wool that diameter is less than the fine glass wool fiber of 1 μ mFiber; In described slurry I, the content of fine glass wool fiber contains than the fine glass wool fiber of other each layer of slurryMeasure high by 5～10%.
10. the poor all-glass paper in low two sides according to claim 9, is characterized in that, described inMicroglass fiber also comprises that diameter is more than or equal to 1 μ m but is less than the raw glass cotton fiber of 3 μ m.
The 11. poor all-glass papers in low two sides according to claim 9, is characterized in that, described inMicroglass fiber is selected from borate glass cotton fiber or alkali-free glass cotton fiber.
The 12. poor all-glass papers in low two sides according to claim 9, is characterized in that standby slurryTime, taking each layer of fiber gross dry weight amount as benchmark, the percentage by weight of various fibers is:
The short chopping 15～25% of alkali-free glass fibre, raw glass cotton fiber 0～65%, fine glass wool fiber10～65%, organic binder bond 5～10%; Wherein, the content ratio of fine glass wool fiber in described slurry IThe fine glass wool fiber content of other each layer of slurry is high by 5～10%; The formula phase of described other each layer of slurryWith.
The 13. poor all-glass papers in low two sides according to claim 12, is characterized in that, standbyWhen slurry, taking every layer of fiber gross dry weight amount as benchmark, the percentage by weight of various fibers is:
The short chopping 15～25% of alkali-free glass fibre, raw glass cotton fiber 40～60%, fine glass wool fiber15～30%, organic binder bond 5～10%; In described slurry I, the content of fine glass wool fiber is more each than otherThe fine glass wool fiber content of layer slurry is high by 5～10%; The formula of described other each layer of slurry is identical.
The 14. poor all-glass papers in low two sides according to claim 9, is characterized in that, described inGround floor accounts for 15～30% of the poor all-glass paper gross weight in described low two sides.
The 15. poor all-glass papers in low two sides according to claim 14, is characterized in that instituteState ground floor and account for 20～25% of the poor all-glass paper gross weight in described low two sides.
Prepared by the poor all-glass paper in low two sides in 16. claims 9 to 15 described in any oneApplication in filter filter core.
17. application according to claim 16, is characterized in that, described filter is coagulation typeFilter.
18. 1 kinds of coagulation type filter elements, comprise in claim 9 to 15 low described in any oneThe all-glass paper that two sides is poor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410166560.4A CN103966887B (en) | 2014-04-23 | 2014-04-23 | A kind of poor method in paper two sides and paper of preparation thereof of reducing |
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| CN201410166560.4A CN103966887B (en) | 2014-04-23 | 2014-04-23 | A kind of poor method in paper two sides and paper of preparation thereof of reducing |
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| Publication Number | Publication Date |
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| CN103966887A CN103966887A (en) | 2014-08-06 |
| CN103966887B true CN103966887B (en) | 2016-05-18 |
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| CN104674607A (en) * | 2015-01-16 | 2015-06-03 | 华南理工大学 | High-precision filter paper for hydraulic oil |
| CN104878642A (en) * | 2015-05-04 | 2015-09-02 | 杭州特种纸业有限公司 | Quantitative filter paper and preparing method and application thereof |
| CN106368072A (en) * | 2016-08-30 | 2017-02-01 | 苏州华泰空气过滤器有限公司 | Production method of composite enhanced filter paper |
| CN106368073A (en) * | 2016-08-30 | 2017-02-01 | 苏州华泰空气过滤器有限公司 | Composite reinforced filter paper |
| CN106948221B (en) * | 2017-03-30 | 2018-08-03 | 重庆再升科技股份有限公司 | A kind of High dust holding quantity of fluid filter composite material and preparation method thereof |
| CN107653736B (en) * | 2017-09-26 | 2020-10-13 | 枣庄市东昌玻纤实业有限公司 | High-strength glass fiber air purification filter paper and preparation method thereof |
| WO2019188974A1 (en) * | 2018-03-29 | 2019-10-03 | 特種東海製紙株式会社 | Glass-plate slip sheet and production method for same |
| CN111235959B (en) * | 2018-11-01 | 2022-07-12 | 华南理工大学 | Multilayer oil-water separation material and preparation method and application thereof |
| CN111254753B (en) * | 2020-03-17 | 2022-05-31 | 珠海菲伯过滤材料有限公司 | Efficient water-resistant air filtering material and preparation method thereof |
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| CN102505554A (en) * | 2011-12-20 | 2012-06-20 | 中材科技股份有限公司 | High-strength glass fiber air filter paper |
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| CN102505554A (en) * | 2011-12-20 | 2012-06-20 | 中材科技股份有限公司 | High-strength glass fiber air filter paper |
| CN103031781A (en) * | 2012-11-19 | 2013-04-10 | 中材科技股份有限公司 | Preparation method of glass fiber air filter paper with low solid phase ratio |
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