TW200932336A - Filter - Google Patents

Abstract

A filter mainly being sheet or cartridge-shaped is provided. The filter has high separation performance and uses the polyolefin extra-fine fiber nonwoven fabric as filter medium to cancel airlock in the filtration operation of the water system liquid and generation of the microbubble, and to resolve a problem of poor authority of water and the generation of bubble. Nonwoven fabric is used for at least one part of the filter medium in the filter. The nonwoven fabric includes extra-fine fiber. The extra-fine fiber is obtained from at least one kind of polyolefin composition which is melted and blended with hydrophilic agent and is molten yarned at a temperature equal to or less than 260 degrees Celsius, and has a average fiber diameter of 0.1-10.0 μm.

Description

200932336 VI. Description of the Invention: [Technical Field of the Invention] The present invention relates to a filter used in filtration of an aqueous liquid. In particular, there is a filter which is mainly a plate or a cylinder which eliminates an air lock or a micro bubble in a filtering operation of an aqueous liquid and improves the pass. A polyolefin ultrafine fiber nonwoven fabric having poor water and a problem of generating bubbles is used as a filter material. Further, in the present invention, the term "aqueous liquid" means a suspension-containing liquid containing 50% by weight or more by weight of water. [Prior Art] A conventional filter material comprising a polyolefin nonwoven fabric capable of filtering fine particles having a particle diameter of 0.1 to several, which is close to 10% by weight, is known to be produced by a melt blow spinning method using a calender roll. The polyolefin ultrafine fiber non-woven fabric is pressurized to carry out a filter material formed by compaction treatment. Because these over-ruthenium materials have a small flow pore size, and the polysulfonated hydrocarbons of the raw materials are themselves hydrophobic, they have poor affinity with aqueous liquids, and when filtered or water-based liquids, there is a problem of poor water flow, that is, gas plugs. Or generate microbubbles. Gas plug Since the filter containing the polysulfide itself is water-repellent, the water permeability is poor, and this phenomenon is particularly remarkable in a filter having a high separation performance of a flow pore size of 0.1 to several μηη. This is because the phenomenon that water does not flow into the fine holes of the transition vessel is called a gas plug. If a gas plug is generated, the fine pores of the filter are not sufficiently used because water σ 4 200932336 flows through a part of the pores, so the filtration is performed in a range smaller than the filter area originally possessed by the filter. At this time, the filtration pressure becomes larger than usual, and it is difficult for water to flow through the finer pores, i.e., since water flows from the larger pores, the separation performance is also inferior. Producing microbubbles

Ο If a filter that generates a gas plug is used, the gas that is retained in the pores of the filter may escape due to some reason such as fluctuations in filtration pressure, and this gas is called microbubbles. The generation of microbubbles causes the liquid to foam, which leads to an increase in the defective fraction of the product, especially in the filtration of paints or plating solutions. The root cause of the gas plug and the generation of microbubbles is the gas trapped in the non-woven fabric. However, sometimes the water-repellent or filtration accuracy can be satisfied even if it is not completely removed. However, since a small amount of retained gas may cause problems, it is necessary to completely eliminate microbubbles. & 4 Since the microbubbles are also generated remarkably as in the gas plug in the filter having a high separation performance of a flow pore size of 0.1 to several μm, the high separation performance cannot be used in the step in which the microbubbles become a problem. Filter. Therefore, the industry expects a filter that produces both micro-audio and performance properties. In order to eliminate the problem of gas plugging or generation of microbubbles, i.e., poor water flow, the following method is employed: the filter is impregnated in ethanol or isopropyl alcohol or the like, and the entire filter is wetted, and then replaced with water_body. It is not observed that the rails are caught when riding water, but if the money is sufficient to mix the people into the road, it will cause obstacles to production during the work or 5, 200932336. In particular, in the case of electroless forging, the influence of the incorporation of alcohol on the electroplating quality is large, and the method of replacing the alcohol described above is often the case. As another method for eliminating the problem of water leakage, it is conceivable to use the following method to produce a non-woven fabric using a resin having a strong affinity with water and to recognize it in a reactor. Examples of the resin having a strong affinity with water include dimethyl acetonitrile or nylon. These resins are not necessarily sufficient as a resin. Moreover, most of the affinity with water is stronger than the water or acid in the local temperature, and the poorly solutionable resin in the aqueous solution cannot be used for the liquid. Further, as another method for eliminating the poor water passing through the weirs of the polystyrene non-woven fabric, a method of hydrophilizing the polybutanol nonwoven fabric is also considered: a method of impregnating the non-woven fabric with the π-cracking method in the hydrophilizing oil agent The gravure plate coated with hydrophilized oil on the non-woven fabric is coated with a hydrophilized __ plate method. However, since any of the two methods is subjected to the hydrophilization treatment after the non-woven fabric, it is difficult to uniformly apply the hydrophilized water to the inside of the non-woven fabric for each of the fibers constituting the non-woven fabric, and the hydrophilicity of the non-woven fabric is easily generated. The concentration is not balanced. In addition, =1, etc., and adjusted to a predetermined concentration to carry out the hydrophilization treatment, but the hydrophilic:::: is originally a hydrophobic non-woven fabric, so the affinity of the non-woven fabric diluted with water is weak, especially at high speed affinity. There is no adhesion to the Wei water (4) _ part becomes water repellent = 6 200932336 聚烯烃 The polyolefin non-woven fabric obtained by this method is not widely used for 'hydrophilization is not sufficient (4), can not completely go or microbubbles . Moreover, like alcohol, the possibility of surface activity is also high. The hydrophilicization of the non-woven fabric of the polyolefin is disclosed, and the method of melt-mixing hydrophilicity is disclosed (for example, refer to the patent document!). However, it is known to be available

❹ The method of making a fiber non-woven fabric, etc., is a case where the hydrophilic agent cannot be used due to the type of resin. [Patent Document 1] Japanese Laid-Open Patent Publication No. Hei No. _71327. SUMMARY OF THE INVENTION An object of the present invention is to provide a transitional device mainly in the form of a plate or a cylinder having a high separation performance and to eliminate water. The hydrocarbon microfiber non-woven fabric of the problem of liquid bubble generation has been studied as an inventor of the present invention. As a result, the above problem can be solved by a filter in which at least a part of the alkali (four) material is made of non-woven fabric, and the nonwoven fabric contains a hydrophilic agent at 260C or 260 by melt mixing. . The inventors of the present invention have completed the present invention based on the above-described findings by obtaining ultrafine fibers of at least one olefin composition which can be melt-spun at a temperature and having an average fiber diameter of from 〇1 to 10.0 μηη. The present invention has the following constitution. (1) A filter in which at least a part of a filter material is used without weaving 200932336. The nonwoven fabric comprises ultrafine fibers which are melt-mixed with a hydrophilic agent and which are capable of melt spinning at a temperature of 260 C or less. A polyolefin composition obtained and having an average fiber diameter of 〇1 to 1 〇〇μιη ° (2) The filter according to (i), wherein the method of producing the ultrafine fibers is a melt-blown method. (3) The filter according to (1) or (2), wherein the average flow pore diameter (ASTMF316-86) is 〇.1 to lo.opm. (4) The filter according to any one of (1) to (3) wherein the hydrophilic agent is an amphoteric substance having both a hydrophilic portion and a hydrophobic portion in the molecule, and the hydrophobic portion has a linear or branched chain a burnt-based substance. (5) The filter according to any one of (1) to (4) wherein the hydrophilic agent is an alkyl polyoxyethylene glycol represented by the chemical formula Rr(OCH2CH2)n_〇H° {where 'Rl It is a linear or branched alkyl group having 22 to 40 carbon atoms; η is a number of 10}. (6) The filter according to any one of (1) to (5) wherein ❾ is formulated with a molecular weight inhibitor in the polyolefin composition. (7) The filter according to any one of (1) to (6) wherein the polyolefin of the polyolefin composition is selected from the group consisting of polypropylene, ethylene-propylene copolymer, and ethylene-propylene-butene copolymer. One or more of them. (8) The filter according to any one of (1) to (7), wherein a melt mass flow rate (MFR: JIS κ 721 〇 (corresponding to 18〇1133) of the nonwoven fabric containing the ultrafine fibers, the test temperature is 230. (:, the nominal load is 2.16 kg) is 1 〇〇〇 to 3000 (g/l 〇 min). 8 200932336 (9) The invention according to any one of (1), (2) and (8) a filter, wherein the polyene: It composition is selected from the group consisting of a melt mass flow rate (MFR: JIS K 7210 (corresponding to ISO 1133) 'test temperature is 230 ° C, nominal load is 2.16 kg) 50 to 100 One or more of a propylene, an ethylene-propylene copolymer, and a propylene-butylene copolymer, containing 0.5 to 10.0% by weight of a chemical formula of CH3(CH2)29-(by weight standard of the polyolefin composition) 〇CH2CH2) 2.5-〇H{, wherein the addition number of ethylene oxide is 2.5 is the average agent} and the 0.01~0.10% by weight of the hindered amine vinegar compound, ie, the molecular weight inhibitor. (10) According to (1) The filter according to any one of (9), wherein the ultrafine fibers are composite fibers containing two or more polyolefin compositions. (11) According to (1) The filter according to any one of (10), wherein the ultrafine fibers are a mixed fiber of two or more kinds of polyolefin composition fibers. (12) According to any one of (1) to (11) The filter is a filter according to any one of (1) to (12), which is a cartridge filter. (14) According to (13) a filter, which is a cylindrical tube in which one or more of the hydrophilic non-woven fabric, the front filter layer, and the liquid upstream side spacer and the liquid downstream side spacer are simultaneously folded into a pleat shape. (15) The filter according to (14), which is a barrel type filter in which the spacer is a long-fiber 9 200932336-dimensional non-woven fabric. According to the present invention, a main plate-like or cylindrical shape can be obtained. A filter having a high separation performance and a polyolefin microfiber nonwoven fabric which eliminates a gas plug or a microbubble in a filtration operation of an aqueous liquid, and which improves the problem of poor water flow and generation of bubbles as a filter material. In order to make the above features and advantages of the present invention more obvious and understandable DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. [Embodiment] The present invention will be described in detail below. The filter of the present invention uses a nonwoven fabric (hereinafter referred to as an ultrafine fiber nonwoven fabric) as a filter material. Obtained at least in part, the non-woven fabric comprises ultrafine fibers composed of at least one poly-smoke which is melt-mixed with a hydrophilic agent in a polyolefin and capable of melt spinning at a temperature of 260 ° C or lower; The material obtained by melt spinning and having an average fiber diameter of 〇1 to 10.0 // m. The filter using the non-woven fabric as at least a part of the filter and the material has excellent solvent resistance of the polyolefin, and has excellent affinity for the aqueous liquid, so that secondary problems are not generated, and the gas plug or the gas plug can be solved. The problem of microbubbles. The polyolefin used in the polyolefin composition of the ultrafine fibers used in the filter material of the filter of the present invention can be exemplified by polypropylene (homopolymer), ethylene-propylene copolymer, ethylene-propylene-butene. Copolymer, high density polyethylene, linear low density polyethylene, low density polyethylene, poly-4-decylpentene-1, and the like. Among these compounds, polypropylene, ethylene·propylene copolymer and ethylene 200932336 olefin·propylene-butene copolymer (hereinafter collectively referred to as polypropylene) have moderate melt viscosity. Therefore, melt mixing of the hydrophilic agent is relatively easy. Further, when a polyolefin is used to constitute a fiber, it is of course possible to obtain chemical resistance as a characteristic of a polyolefin and a property which does not generate a harmful gas upon combustion. The melt mass flow rate of polypropylene which can be preferably used in the present invention (JIS K 7210, test temperature 23 (rc, nominal load 2 16 kg, hereinafter referred to as MFR) is 1 to 2000 (g/i〇min) If the MFR is within the range described, in the method for producing the ultrafine fibers, it is preferable to use the secret bond not only to perform spinning at a relatively low temperature but also to uniformly mix with the hydrophilic agent. Preferably, it is 5 to 5 angstroms (g/1 〇 min), and 100% of the polypropylene women are easily obtained, and since the shape is a uniform granule, it is also allowed to be 'so that it can be uniformly mixed with the hydrophilic agent. Mouth decomposition == water agent can be preferably used in the case of melt mixing. It is not easy to be sulphuric acid. The sulphate sulphate county represents an ionic compound, a cationic compound represented by a grade, and a polyoxyalkylene chain is bonded to an ethoxylated alcohol skeleton. The amphiphilic substance having both the Wei water and the hydrophobic part in the base compound is a linear or branched filament in the molecular group. For example, t = hydrophobic alcohol, sweet (tetra), polyoxyalkylene fatty acid g In the poly-B- 2 aliphatic group P and the hydrophobic part The hydrophilic agent component has a hydrophilic phase 11 200932336 in the molecule, and if melt-mixed in the hydrophobic polyolefin resin, the hydrophilic portion of the hydrophilic agent component gradually moves from the inside to the outside of the resin. If the hydrophilic portion of the hydrophilic agent component When exposed on the surface of the resin, that is, the surface of the ultrafine fibers, the hydrophobic portion of the hydrophilic agent component remains in the interior of the polyolefin because of its affinity with the polyolefin, and the surface of the ultrafine fiber is covered by the hydrophilic portion of the hydrophilic agent component. Forming a structure in which each of the ultrafine fibers exhibits hydrophilicity and the hydrophilic agent is difficult to be detached from the polyolefin. If the hydrophobic portion of the hydrophilic agent is decyl, the hydrophilic agent is formed because the affinity with the polyolefin becomes stronger. A structure which is more difficult to be detached from the polyolefin. Among the hydrophilic agents, a hydrophilic agent having the following structure disclosed in the handbook of International Publication No. 2/〇4253 is preferred. R1-(Hydrophilic oligomer) R1 is a linear or branched alkyl group having 22 to 40 carbon atoms, and the hydrophilic oligomer is derived from epoxy (10), propylene-propylene A single or oligomer unit of ethylene glycol, propylene glycol, acrylic acid, methacrylic acid, vinyl alcohol or vinyl acetate, the unit of which is 2 to 10. The compound may be exemplified by having R1-(OCH2CH2)n. a compound of the structure shown by 〇H. Here, n is a number of 2 to 1 Å. More specifically, for example, CgH3(CH2)29-(OCH2CH2)2.5_〇H (epoxy ethene) The ethoxylated aliphatic alcohol which is represented by the addition number of 2 5 疋 average is exemplified. The hydrophilic agent may be used singly or in combination of two or more. The amount of the T-water agent added depends on the type of the hydrophilic agent to be used. However, there is no upper limit in the range in which the stability of spinning does not decrease. 12 200932336 The amount of hydrophilic agent added is 〇〇5~2〇 〇/ relative to the polyolefin composition. 'It is preferably 0.5 to 9% by weight, and the amount of fruit added is within this range, that Μ Μ ώ ώ 魏 魏 , , , , , , , , , , , , , , , , , , , , , , 》 》 》 》 》 》 》 》 》 》 》 The polyolefin composition for constituting the ultrafine fibers must be capable of being spun at a temperature of: 仞 or 26 〇 t > c. ❹ Usually, 'When the secret tree is melted into the filament (10); when the T method obtains the ultrafine fiber, the resin must be heated at a high temperature to lower the melt viscosity of the resin. If a polypropylene which can be preferably used in the present invention is exemplified, since most of the resins which are extremely common and can be easily purchased have a MFR of as low as 1 Torr or less, it is necessary to be higher. The temperature to heat up. Since the heating temperature reaches the volatilization or decomposition temperature of the hydrophilic agent, it is preferred to add a molecular weight inhibitor to the resin at this time. The use of the molecular weight inhibitor enables spinning without imparting a burden to the hydrophilic agent. and

And 'of course, due to the heat drop' utility cost (c〇st) or the operating environment is improved. The molecular weight inhibitor of the A is exemplified by an organic peroxide compound represented by benzoyl peroxide, decyl ketone ethyl ketone or cyclohexanone peroxide, or a hindered hydroxylamine ester compound. Among them, a hindered hydroxylamine ester compound which can relatively easily control the molecular weight of the resin is preferred. Since most of the hindered amino ester-based compounds lack reactivity at normal temperature and begin to exhibit a function of lowering the molecular weight after reaching a high temperature, the reaction of the unreacted material does not occur after the filter is formed, and the resin is deteriorated. 200932336 'Because of its structure, the power moon as a characteristic light stabilizer is also expressed after spinning. The hindered amine vinegar compound is exemplified by the international publication 2 〇〇 6 / :=; rKt revealed by N. In addition, the amount of the hindered phenolic molecular weight inhibitor (active ingredient) to be added to the polyolefin composition for forming the ultrafine fibers is appropriately changed depending on the MFR of the polyolefin to be used, and the MFR is 50 to 1 〇. When 〇(g/10min), '0.01 to 0.10% by weight can be exemplified. In the present invention, as long as it does not hinder the effects of the present invention, in addition to the hydrophilic agent or the molecular weight inhibitor, various stabilizers, ultraviolet absorbers, thickening branching agents, and the like, may be blended with the polyfluorinated hydrocarbon composition as needed. Various other modifiers, etc. In the present invention, the "polyolefin composition for constituting the ultrafine fiber spinning can be exemplified by the following mixture", that is, an additive such as a hydrophilic agent and an optional knife amount inhibitor is added to the polyene smoke and used. A mixture obtained by mixing a tumbler mixer (a mbier mixer), a high speed mixer, or the like. In order to inhibit thermal decomposition or volatilization of the hydrophilic agent, the polyolefin composition must be at 260 ° C or below, preferably 25 Torr. (: or 25 (TC or less, more preferably 210 to 25 (melting at a temperature of Π: can be melt-spun into ultrafine fibers. Therefore, the standard is a very fine fiber or a very fine fiber obtained by melt-spinning the condensed tobacco composition) The MFR of the non-woven fabric is preferably i〇〇〇~3_(gn〇min). The ultrafine fiber and the ultrafine fiber non-woven fabric 200932336 The ultrafine fiber non-woven fabric in the present invention refers to the microfiber containing the ultrafine fiber, and the ultrafine fiber in the present invention is From the melting of the polyolefin composition, ', the obtained fiber, then any manufacturing method can be. Special, the heart of the 疋 combines the spinning step and the non-woven step into a single step = dazzle, 'but The so-called melt-blown method refers to e-jet which sprays the air between the tree door and the fiber is arranged in an open fiber to make a non-woven fabric. Since this method can relatively easily obtain a fiber diameter of several m, ultrafine fibers, Moreover, the obtained non-woven fabric is also fine, so it is suitable, and it is also preferable in terms of productivity, manufacturing cost, etc. = The effect of the present invention is not impaired, the pole of the present invention The structure of the fiber = 疋 — - poly _ resin fiber, may also be a composite fiber with two components or two or more of the polythene resin. Moreover, it is also possible to use a mixed fiber of a single fiber which is different in raw materials, or The single fiber fiber is composed of filaments. The composite structure can be arbitrarily typed with a slightly core type, a side by side type, an island type, etc. In addition, it can also be a composite having a profiled cross-sectional structure, a split-type structure, and a hollow structure. Further, 'when the (four) clock composite fiber is used, the hydrophilic agent may be mixed in the sap of the lion. The average diameter of the fiber diameter of the ultrafine fibers in the present invention is preferably 〇1 to =·〇_' more preferably 05 to 3 5. The corpse and the diameter of the iron dimension should not be applied to the σ-Machine when spinning in this range. Therefore, the fiber: cracking is difficult to produce the fiber when it is made into a filter. Also good. 15 200932336 The smaller the fiber diameter of the ultrafine fibers, the smaller the gap formed by the fibers, so the average flow pore size and filtration accuracy of the filter are made small. On the other hand, the fiber diameter Small, the pressure necessary for liquid passage becomes larger, and the probability of generation of a trapped gas which becomes a gas plug or a cause of generation of microbubbles becomes high when the technique of the present invention is not used. Therefore, the fibers constituting the ultrafine fibers of the filter The smaller the diameter and the smaller the average flow pore size and the filtration accuracy, the more remarkable the effect of the present invention.

The range of the weight per unit area of the ultrafine fiber nonwoven fabric in the present invention is not particularly limited, and if calendering or pleating is considered as the subsequent step, it is preferably 3 to 500 g/m2. Among them, in terms of operability, Lu is preferably 5 to 200 g/m2. The range of the air permeability of the ultrafine fiber nonwoven fabric in the present invention is not particularly limited. For example, when the weight per unit area of the nonwoven fabric is 13 g/m 2 , it is preferably 5 to 40 cm 3 /cm 2 /s, which is 4 〇 g / In the case of m2, it is preferably 3 to 2 〇 cm 3 /cm 2 /s. As long as it is within these ranges, it is easy to carry out the post-processing of the non-woven fabric, and it is difficult to cause defects such as pinholes, and the obtained filter has excellent filtration precision. In the present invention, since the fiber intersection of the ultrafine fiber non-woven fabric is transferred to the spinning heat-reducing heat, it can be directly (four) or (four) used in the material, or it can be calendered in a single layer or a plurality of layers, that is, Lee pressure # know that the heating roller is compacted and used as a material. Further, in addition to the 弋 弋, it is also possible to rework the woven fabric by using a method such as subtraction using a heated air for volume reduction or multilayering. 200932336 Plate Filter In the present invention, the over-rubber material can be cut into an appropriate size and used as a plate filter. The average flow pore diameter (ASTM 4-6-86) of the filter material used as the plate filter is preferably (Mmo.o _.) As long as the average flow pore diameter is easily produced in the above range (10), the fulcrum is also sufficient. The non-woven fabric exhibits 1 〇〇 or 1 纺 after spinning, and can be used to meet the range by stratifying or reworking the quilt. A thicker filter having a flow pore size of more than 5 〇//ηι can be sufficiently ventilated even if it does not have a hydrophilic agent, so that it does not cause a gas plug, but sometimes it is microscopically retained by a small amount of retained gas. The reason why bubbles are generated, therefore, the present invention can be used to prevent the generation of microbubbles. Cartridge Filter The ultrafine fiber nonwoven fabric of the present invention can be used as a filter material for a cartridge filter. At this time, the ultrafine fiber nonwoven fabric can be cut after spinning. It can be directly used after being appropriately sized, and it can also be reworked, for example, calendering, or the above-mentioned plate type blouse can be used. As a cylindrical alkali machine, the non-woven fabric is wound into a core. A depth type of a multi-layer structure or a pleat shape in which a non-woven fabric folded into a pleated shape (i.e., pleated) is processed into a cylindrical shape is suitable for the present invention. Since the filter of the present invention becomes a filter having a relatively high pressure loss, a filtration area is preferred. Larger _. Generally, the larger the filter area, the more excellent the water permeability of the filter. When the ultrafine fiber non-woven fabric of the present invention is used as a pleated barrel filter 17 200932336, the ultrafine fiber non-woven fabric can be used alone, It can be used at the same time, and it can be used after it has been processed and processed. Moreover, in order to reduce the burden on the cloth; the cloth can also be filtered and layered before it is set up. = The efficiency of the filter layer is compared with that of the microfiber non-woven fabric. Low in-feed, material and staged filtration to extend the life of the entire filter. If it is over the rider, ie, the upstream side and the lower layer of the spunbonded non-woven fabric, such as the non-woven fabric or the net ❹, Between the upstream side and the downstream of the field, the liquid phase is reduced by the contact of the wrinkles. Therefore, when the second piece is == woven = spacer, the unit surface of the non-woven fabric g, as long as the weight per unit area is sufficient, and the thickness of the non-woven fabric is sufficient and can be used as the same == and the raw material of the spacer sheet is preferably pleated with the ultrafine fibers, the cloth may be folded immediately, or after folding 4 Heating/heating of extremely fine fibers is not easy. Table = + Depending on the content of the hydrophilic component, it may be replaced by a very finely folded microfiber non-woven fabric. The corpse will be heated after stacking, then the lion-like retention 2 Fold the temperature between the glass transition point and the melting point. ",, / Li You 18 183232336 Next, the pleated single-layer microfibers are bonded to the ends of the laminate to form a cylindrical shape. The joining method is preferably a heat-sealing method such as a method of performing a method such as a method of ultrasonic wave transfer, etc. The cover plate of the ultrafine fiber is formed into a cylindrical shape, or a core of a porous cylindrical core is disposed in the center of the body. , ❹ ❹ Configure a porous cylindrical barrel and transfer it at its _ end to get the job (4). To make or 'to make the barrel by pressure 1 = add = direction to 'when making the filter from the outside to the inside of the type of filter while using the core' when making the transition in the opposite direction and, for _ For anti-cleaning, you can use both of them. The raw materials of the core, the outer cylinder and the top cover used at this time may use any resin or metal as the raw material of the top cover, especially in order to make it contact with the ultrafine fiber, and the compatibility between the fine and the fine non-woven fabric is better. Good resin. As a method of adhering the top cover, a method of bonding by heating and melting the bonding surface of the top cover, or a method of causing molten resin to flow into the top cover for bonding is preferable. [Examples] Hereinafter, the present invention will be described in more detail by way of examples, but the present invention is not limited to the examples. In addition, the method of measuring the actual towel (10) is as follows. (1) Average fiber diameter: The position of the test piece was photographed using an electron microscope, and the diameter of about 20 fibers was measured for each photo, and photographed and measured at 5 or more positions, for a total of 1 inch. The diameter of the fiber above the root or the root of the root is averaged. 19 200932336 (2) Weight per unit area: After cutting a test piece of 25 cm x 25 cm from any 5 parts of the non-woven fabric, the weight of each test piece is measured using an electronic balance, and the average value is converted into the weight per m 2 . Come as the weight of the bit area. The unit is g/m2. (3) Ventilation: The test is carried out according to the ventilation test method specified in 1% of the heart (corresponding to 18〇9237). In addition, the test machine used a Fragile type test machine. The unit is cm3/cm2/s. (4) Average flow pore size (Perm-Porometer according to ASTM F316 86 (P0R0US MATERIALS mc manufactured. (5) Filtration accuracy: The cartridge filter is mounted on the housing of the circulating filtration performance test machine, using The pump adjusts the flow rate to perform the water circulation cycle. Secondly, Ac Fine-Test-Dust is continuously added to the circulating water at 3 g per minute. The raw liquid and the filtrate are collected from the start of the addition to 5 minutes, and each liquid is collected using a light scattering particle detector. The number of particles contained in the measurement is measured and the capture efficiency is calculated. The capture efficiency is shown as the minimum particle size of 99 9% or 99 9% 作为 or more as the filtration accuracy. In addition, the flow rate during the water circulation cycle is adjusted in the plate filter. It is 5000cm3 per minute and is adjusted to 60000 cm3 per minute in the cartridge filter. (6) Confirmation of gas plug and microbubble generation: Install the filter on the outer casing of the test machine. Use the pump to adjust the flow rate to perform the water circulation cycle. When the pressure difference between the filter before and after the filter is used as the pressure loss, the water flow cycle is performed in this state for 1 minute. It was confirmed by visual observation that in the tank of the circulating filtration performance tester, the piping from the secondary side of the outer cover 20 200932336 was bubbled, and it was recorded as X when microbubbles were generated, and if it was not confirmed, it was produced as no microbubbles. The situation is marked as 〇. Secondly, the filter is removed once and the filter is immersed in isopropyl alcohol. 'The filter that has been immersed in the alcohol is again mounted on the outer cover, and the flow rate is adjusted by the pump. Water circulation: The pressure difference before and after the filter at this time is taken as the pressure loss B. If the pressure ratio = A/B is less than 1.05, it is marked as ◎ as a no air plug, and if it is 1.05 or more and less than 1.1, it is marked as 〇, If it is 1.1 or more, it is marked as χ. In addition, in the plate filter, the flow rate in the water circulation cycle is adjusted to 5000 cm 3 per minute, and it is tuned to 60000 cm 3 per minute in the cartridge filter. Relative to polypropylene (Homopolymer, MFR: 75, trade name SA08, manufactured by Sakamoto Pochem Co., Ltd.) to give a hydrophilic agent containing an active ingredient represented by the chemical formula CH3(CH2)29(OCH2CH2) 2.50H ( Ciba Irugasurf-HL560 manufactured by the company, whose active ingredient is 60% by weight) reaches 3.0% by weight, and contains a hindered hydroxylamine ester compound as an effective bismuth molecular weight inhibitor (Irugatec-CR76 manufactured by Ciba, the active ingredient is 3.3% by weight). %) was added in a manner of up to 1% by weight, and was spun from a spinning nozzle (pore size: 3.3 mm' pitch of 1. Ornm, 501 holes) at a spinning temperature of 250 ° C. It was extruded and melt blown using a heated air of 360 °C. A non-woven fabric (A) having a weight per unit area of 13 g/m 2 and a non-woven fabric (B) having a weight per unit area of 40 g/m 2 were prepared by adjusting the pressure of the heated air, the discharge amount, and the non-woven fabric carrying-out speed. Two kinds of non-woven fabrics. Next, two non-woven fabrics (A) and one non-woven fabric 21 200932336 (B) are laminated and compacted using a calender roll having a drum temperature of i20 ° C to obtain a plate type composed of a hydrophilic polypropylene fine non-woven fabric. Consider the device. It was cut into a circular shape having a diameter of 142 mm and the test was carried out. The measurement results are shown in Table 1. (Example 2)

In addition to the hydrophilic agent (Irugasurf HLSGO manufactured by Ciba), which is 5.0% by weight, the molecular weight inhibitor (Irugatec CR76 manufactured by Ciba) is 0.5 wt. 4, and extruded at a spinning temperature of 23 ° C, In the same manner as in Example 1, spinning was carried out to obtain a non-woven fabric (A) per unit area having a weight of '5 〇g/m2.) Next, the drum temperature was 12 Torr. The 对's pair of rollers are used to process the non-woven fabric (A), and the lining is made of a hydrophilic polypropylene micro-non-woven fabric. It was cut into a circular shape having a diameter of 142, and the test was carried out. The measurement results are shown in the table. (Example 3) The test was carried out in the same manner as in Example 2 except that the old wire temperature was a shoe. The measurement results are shown in Table 1 (Example 4). I, Γ: γτ?7 of Ing_f-HL560 manufactured by Ciba. The % and molecular weight inhibitors were used in addition to the method of manufacturing a method manufactured by Ciba Corporation, and the test was carried out in the same manner as in Example 1 except that the amount of the method was 5% by weight. The test results were obtained (Example 5). 22 200932336 A composite spinning nozzle for melt-blown, which is a sheath-core type composite fiber, is used. The core side is made of polypropylene (Homopolymer, MFR: 75, trade name SA08 '曰本p0Chem) ), the sheath side is an ethylene-propylene copolymer (MFR: 61 'trade name: pS4916, manufactured by Sakamoto Pochem Co., Ltd.), and a hydrophilic agent (Iggasurf-HL560 manufactured by Ciba) is 3.0% by weight, a molecular weight inhibitor A plate type was produced in the same manner as in Example 1 except that they were added to both polypropylene and ethylene-propylene copolymer in a manner of 1.% by weight of Irugate C-CR76. The test was carried out and the test was carried out. The results of the measurement are shown in Table 1. (Example 6) The same procedure as in Example 5 was carried out except that the hydrophilic agent (Iruga SUrf-HL560 manufactured by Ciba) was not added to the polypropylene on the core side. Method of making a board The filter was tested and the test was carried out. The results of the measurement were shown in the table. (Example 7) The mixed fiber for melt-blown spray of the nozzle hole was arranged in such a manner that the two resins were extruded from alternate positions of the holes. Spinning nozzle, two resins are polypropylene (Homopolymer, MFR: 75, trade name SA08, manufactured by Sakamoto Pochem) and ethylene-propylene copolymer (MFR: 61, trade name ps4916, Japan P〇Chem Manufactured by the company, and added to the polypropylene in such a manner that the hydrophilic agent (IrugaSUrf-HL560 manufactured by Ciba) reaches 3.% by weight and the molecular weight inhibitor (hgat (four) R76 manufactured by Ciba) is recited as Q% by weight. A plate filter was produced in the same manner as in Example 1 except for the use of the B-propylene copolymer, and the test was carried out. The results of Measurement 23 200932336 are shown in Table 1. (Example 8) Except for use A polypropylene plate (Homopolymer, MFR: 1800, powdered product, trade name: PP3546G, manufactured by ExxonMobil Co., Ltd.) was used, and a plate type reactor was produced in the same manner as in Example 1 except that the molecular weight inhibitor was not used, and the test was carried out. The measurement results are shown in Table 1. (Example 9)

❹ In addition to using 0.03 wt% of peroxide 2,5-dimercapto-2,5-di(peroxy-tert-butyl)hexan (Perhexa 25B manufactured by Oyster Oil Co., Ltd.) as a molecular weight inhibitor, The same method was used to make a plate filter and the test was carried out. The measurement results are shown in the table. (Example 10) A plate type filtration '11 was produced in the same manner as in Example ι except that 2% by weight of an alkanesulfonate (ChemiStat 3033N manufactured by Sanyo Chemical Industries, Ltd.) was used as a hydrophilic agent, and the test was carried out. in FIG. 1. (Comparative Example 1) A test was carried out in the same manner as in the case of the actual addition, except for the addition of the hydrophilic agent. The results of the measurement are shown in Table 1. (^Compared with Example 2^, it can be seen that there are gas plugs and microbubbles. In addition to the method of adding hydrophilic sputum, the same method as in Example 3 was used to prepare the test, and the test was carried out. If it is compared with Example 3, it is known that there is micro (10) generation. Medium 24 200932336 (Example 11) The plate filter obtained in Example 1 was cut into a width of (10) mm and then its layer 4 was 3 Layers, and a layer of polypropylene spunbonded non-woven fabric (4Q coffee 2 per unit area, RN2040, manufactured by Idemitsu Unitec) is placed on the upper and lower layers, and the width is 1 〇 的 加 加 以 以 褶 褶 褶 12 12 12 Strip way to cut, plate

The ends are bonded to each other and formed into a cylindrical shape, and then the core is disposed on the inner side, the outer cylinder is disposed on the outer side, and the top cover is adhered to both ends thereof, thereby preparing an inner diameter of 28 111111 and an outer diameter of 7 〇. 111111, a barrel filter of length 25〇111111, and the test was carried out. The measurement results are shown in Table 2. (Example 12) A tubular filter was produced in the same manner as in Example 11 except that the plate filter obtained in Example 2 was used, and the test was carried out. The measurement results are shown in Table 2. (Example 13)

A tubular filter was produced in the same manner as in Example 11 except that the plate filter obtained in Example 3 was used, and the test was carried out. The results of the measurement are not shown in Table 2. (Example 14) A tubular filter was produced in the same manner as in Example 11 except that the plate filter obtained in Example 4 was used, and the test was carried out. The measurement results are shown in Table 2. (Example 15) A tubular yoke was fabricated in accordance with the use of the plate filter obtained in Example 5, and the test was carried out with 25 200932336 = two = 。. Test (Example 16) A cartridge filter was produced in the same manner as in Example η except that the plate type pulverizer obtained in Example 6 was used, and the test was carried out. The test results are not shown in Table 2. (Example 17) ❹ Ο In addition to the use of the plate type filter obtained in Example 7, the test was carried out in the same manner as in Example 11 and the test was carried out. The measurement results are shown in Table 2. (Example 18) A tubular filter was produced in the same manner as in Example 11 except that the plate filter obtained in Example 8 was used, and the test was carried out. The results of the test are not shown in Table 2. (Example 19) A tubular filter was produced in the same manner as in Example 11 except that the plate filter obtained in Example 9 was used, and the test was carried out. The measurement results are shown in Table 2. (Example 20) A tubular filter was produced in the same manner as in Example 11 except that the plate type filter obtained in Example 10 was used, and the test was carried out. The measurement results are shown in Table 2. (Comparative Example 3) A tubular filter ‘ was produced in the same manner as in Example 11 of 26 200932336 except that the plate filter obtained in Comparative Example 1 was used, and the test was carried out. The results of : Bayes are determined in Table 2. If compared with Examples 11 to 2, then, it is known that gas plugs and microbubbles are produced. (Comparative Example 4) A tubular filter was produced in the same manner as in Example 11 except that the plate filter obtained in Comparative Example 2 was used, and the test was carried out. The results of the measurement A are shown in Table 2. If it is compared with Example 13, it is known that & bubble generation.

Table 1

实* &例——— ----- - 1 1 2 3 4 5 6 7 8 [ΤΓ Non-woven fabric (A) Performance---- Average fiber diameter μηι 0.9 2.1 8.3 1.1 1.0 1.0 1.0 1.0 1.5 —-- -- 2.0 1 ft Air permeability cm3/cm2/s 21 19 78 26 21 21 21 22 ΊΓ 2i Weight per unit area g/m2 13 50 50 13 13 13 13 13 1Γ 〇0 ~l〇~" — A non-woven fabric (B) Performance average diameter μπι 1.0 - - 1.2 1.1 1.1 1.1 1.1 1.5 2.2 uT Ventilation cm3/cm2/s 10 - - 13 11 11 11 11 15 32 10 Weight per unit area g/m2 40 - - 40 40 40 40 40 40 40 40 Plate filter performance filtration accuracy μηι 0.6 3.1 8.0 0.8 0.6 0.6 0.6 0.6 2.1 4.5 0.8 8.2 Average flow pore size μπι 0.49 2.4 6.5 0.78 0.5 0.5 0.49 0.52 1.1 3.6 0.48 7.2 Weight per unit area g/m2 68 50 50 70 68 69 68 67 68 68 69 50 Air plug ◎ ◎ ◎ ◎ ◎ ◎ ◎ ο ◎ ο X o Pressure loss A MPa 0.140 0.021 0.009 0.094 0.142 0.143 0.140 0.150 0.045 0.015 0.253 0.011 Pressure loss B MPa 0.139 0.021 0.009 0.094 0.140 0.140 0.138 0.141 0. 044 0.014 0.143 0.010 Milling ratio A/B 1.01 1.00 1.00 1.00 1.01 1.02 1.01 1.06 1.02 1.07 1.64 1.1 Micro bubbles ο ο ο ο 0 ο 0 ο ο ο X X 27 200932336 Table 2

EXAMPLES Comparative Example 11 12 13 14 15 16 17 18 19 20 3 4 Cartridge filter performance filtration accuracy μιη 0.6 3.0 8.1 0.8 0.7 0.7 0.7 0.8 2.0 4.7 0.8 8.2 Air plug ◎ ◎ ◎ ◎ ◎ ◎ ◎ 0 ◎ 〇X ◎ Pressure loss A MPa 0.133 0.018 0.008 0.089 0.136 0.136 0.134 0.144 0.037 0.014 0.253 0.009 Pressure loss B MPa 0.131 0.018 0.008 0.087 0.133 0.132 0.130 0.134 0.035 0.013 1.98 0.009 Pressure ratio A/B 1.02 1.00 1.00 1.02 1.02 1.03 1.03 1.07 1.06 1.08 1.31 1.00 micro Bubble 〇0 0 0 〇0 〇0 〇〇XX

[Industrial Applicability] The filter is a filter that is indispensable for avoiding air plugs and generating microbubbles. In particular, a filter for filtering paint or plating solution. Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims. [Simple description of the diagram] 〇 No [Main component symbol description] None 28

Claims (1)

200932336 VII. The scope of application for patents: 1. Seeds; the device, at least part of its over-twisting material is not woven~ The non-woven fabric contains very fine fibers. The ultrafine fibers are made by melt mixing ^ hydrophilic® and at 26 (Γ (: or 2WC) The filter of the at least one type of hydrocarbon composition of the smelting of the singularity of the singularity of the singularity of the singularity of the singularity of the singularity of the singularity of the singularity of the singularity of ❹ The method of manufacturing fine fiber is melt-blown. 3. For the transition device described in the scope of the application, the average flow pore diameter (ASTMF316-86) is (10)~ then 哗. The filter according to the above, wherein the hydrophilic agent has an amphoteric substance having both a hydrophilic portion and a hydrophobic portion in the molecule, and is a substance having a linear or branched alkyl group in the hydrophobic portion. The filter according to claim 2, wherein the hydrophilic agent is an alkyl polyoxyethylene alcohol represented by the chemical formula R1 _(〇CH2CH2)n-0H, wherein R1 is a carbon atom number of 22 a linear or branched alkyl group of up to 40; The filter according to claim 1, wherein the filter is prepared in the polyolefin composition. 7. The filtration as described in claim 1 The polyolefin of the polyolefin composition is one or more selected from the group consisting of polypropylene, ethylene-propylene copolymer, and ethyl propylene-butene-butene copolymer. 29 200932336 8. Scope of application The filter according to Item 1, wherein the non-woven fabric containing the ultrafine fibers has a melt mass flow rate (MFR: K: 7210 (corresponding to ISO 1133), a test temperature of 230 ° C, and a nominal load of 2.16 kg) The filter according to claim 1, wherein the polyolefin composition is at a melt mass flow rate (MFR: JIS K 7210 ( Corresponding to ISO 1133) 'Test temperature 23 (TC, nominal load 2.16 kg) 50~1 〇〇 one or one selected from the group consisting of polypropylene, ethylene propylene copolymer and ethylene propylene propylene copolymer In the above, the weight of the polyhydrocarbon composition is 0.5 to 1 〇.〇% by weight of the chemical formula CH3(CH2)29-(〇CH2CH2)2.5-OH{wherein, the addition number of ethylene oxide is 2.5 is the average value of the hydrophilic agent and 0.01~0.10% by weight as the molecular weight inhibitor The filter according to claim 1, wherein the ultrafine fiber is a composite fiber containing two or more polyolefin compositions. The filter according to claim 1, wherein the ultrafine fibers are a mixed fiber of two or more polyolefin composition fibers. 12. The filter according to any one of claims 1 to 11, which is a plate filter. 13. The filter according to any one of claims 1 to 11, which is a cartridge filter. ^ 14. The filter described in claim 13 is to be 30 200932336 One or more of the layer of the hydrophilic nonwoven fabric, the front filter layer, and the liquid upstream side spacer and the liquid downstream side spacer are simultaneously bent into a pleated cylindrical cartridge filter. The filter according to claim 14, which is a cartridge filter in which the spacer is a long fiber non-woven fabric. 31 200932336 IV. Designated representative map: (1) Designated representative figure of the case: None (2) Simple description of the symbol of the representative figure: No. 5. If there is a chemical formula in this case, please disclose the chemical formula that best shows the characteristics of the invention: no 3