WO2005058458A1 - 低圧力損失積層不織布およびフィルター - Google Patents
低圧力損失積層不織布およびフィルター Download PDFInfo
- Publication number
- WO2005058458A1 WO2005058458A1 PCT/JP2004/018799 JP2004018799W WO2005058458A1 WO 2005058458 A1 WO2005058458 A1 WO 2005058458A1 JP 2004018799 W JP2004018799 W JP 2004018799W WO 2005058458 A1 WO2005058458 A1 WO 2005058458A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- nonwoven fabric
- polyester
- filter
- woven fabric
- laminated
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
- B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
- B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
- B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/559—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving the fibres being within layered webs
Definitions
- the present invention relates to a nonwoven fabric having low pressure loss and high shielding properties and excellent filter characteristics, and a filter using the same.
- the present invention relates to a filter for performing cartridge drawing after pleating.
- Nonwoven fabrics are widely used as filter media for filter products.
- a roll-type filter in which a nonwoven fabric is wound concentrically around a core member or a pleated-type filter subjected to a fold processing is used as a liquid filter or an air filter.
- a one-pass filter reduces the fiber density on the particle inflow side to collect particles in the depth direction of the filter medium.
- Patent Document 1 For filter media that shakes particles with vibration or air pressure and performs filtration many times, the above-mentioned method is preferable because it causes clogging. It ’s not. Therefore, a measure is taken to smooth the surface of the filter medium to improve the releasability of the particles. For example, a method of calendering the filter medium to smooth it, or covering the surface of the filter medium with a polytetraethylene microporous membrane has been adopted. However, in the case of calendering, there is a problem that the airflow resistance increases, and the cost of coating with a microporous membrane increases.
- Non-Patent Document 1 Textile Research Jounal, 48,309, 1978
- Patent document 1 Republished patent W098Z13123
- the first invention is characterized in that the flexural rigidity is 0.10-1.50N / 2cm, and the final pressure loss is 600Pa or less according to the following load test. It is a non-woven fabric.
- Pulse control Time control
- Pulse conditions pressure 0.3MPa, interval 2min, injection time 0. Is
- Test powder 10 kinds of JIS test dust
- the second invention the fiber diameter of 7 20 xm fiber strength, Rannahli, basis weight of 10- 100 g / m 2 of port Riesuteru based nonwoven A, the melting point of the sheath component is 110 ° C- 250 ° C Intermediate polyester with a core component melting point of 185 ° C to 300 ° C, with a fiber diameter of 20 50 ⁇ m A core-sheath composite fiber is basis weight containing 50% or more is 15-200 g / m 2 nonwoven B, the laminated nonwoven polyester nonwoven C having a basis weight is 30- 200 g / m 2 are laminated and integrated, total basis weight Is 400 g / m 2 or less.
- a third invention is the laminated nonwoven fabric according to the first or second invention, wherein the polyester-based nonwoven fabric is made of a polyester obtained by copolymerizing a phosphorus-based flame retardant. is there.
- a fourth invention is the laminated nonwoven fabric according to any one of the first to third inventions, wherein the polyester nonwoven fabric is a polyester-based nonwoven fabric on which metal deposition has been performed.
- a fifth invention is a laminated nonwoven fabric characterized in that a microporous membrane is disposed on a filtration surface of the laminated nonwoven fabric according to any one of the first to third inventions.
- a sixth invention is a low pressure loss filter using the laminated nonwoven fabric according to any one of the first to fifth inventions.
- a seventh invention is a low pressure loss filter of a cartridge type incorporating the pleated laminated nonwoven fabric in the low pressure loss filter according to the sixth invention.
- the laminated nonwoven fabric which is flame-retardant and has high rigidity and excellent filter characteristics.
- the deformation due to the fluid resistance during the filtration operation is small, and the laminated nonwoven fabric is suitable as a filter.
- the laminated nonwoven fabric can be used as a filter with good dust removal and removability.
- the laminated nonwoven fabric of the present invention preferably has a final pressure loss in a load test of 600 Pa or less. More preferably, it is 500 Pa or less.
- a non-woven fabric with a final pressure loss of more than 600 Pa causes a problem that the life of the filter is short.
- the flexural rigidity of the laminated nonwoven fabric is desirably between 0.10 and 1.50NZ2cm. Oka IJ If the property is less than 0.1 nN / 2 cm, problems such as pleating and use as a filter or non-woven fabric as a part of the structure tend to cause deformation such as bending will occur. . Even if the flexural rigidity is 1.5 N / 2 cm or more, there is no major problem in practicing the present invention, but it is presumed that it is sufficient if it is within the scope of the present invention.
- a means for laminating and bonding nonwoven fabrics may be used. By laminating and bonding non-woven fabrics, it is possible to achieve both high rigidity and extended filter life.
- the surface material of the laminated nonwoven fabric is preferably a polyester spunbonded nonwoven fabric.
- a short-fiber nonwoven fabric When a short-fiber nonwoven fabric is used as the surface layer material, the cost increases because more processes are required than a spunbond nonwoven fabric, which is a long-fiber nonwoven fabric, and there is a problem that an inexpensive nonwoven fabric cannot be provided. Further, even with spunbonded nonwoven fabrics, polyolefins have problems with heat resistance, and polyamides have problems with operability. In contrast, polyester-based spanbond nonwoven fabrics have excellent mechanical and chemical properties and can be used for a wide range of applications.
- the raw material of the nonwoven fabric A of the surface layer is a flame retardant polyester obtained by copolymerizing a phosphorus-based flame retardant.
- a flame retardant polyester obtained by copolymerizing a phosphorus-based flame retardant.
- Phosphorus-based flame retardants include (2-carboxyethyl) methylphosphinic acid, (2-carboxyethynole) phenylphosphinic acid, (2-methoxycarboxylechinole) phenylphosphinic acid, and (2-hydroxyethyl).
- Preferred are (2-carboxyethyl) methylphosphinic acid and (2-carboxyethyl) phenylphosphinic acid.
- the amount of phosphorus added to the phosphorus-based flame retardant is preferably such that the phosphorus atom content in the polymer is 0.1 to 4.0% by weight. More preferably, it is 0.3-3.0%. Caro with phosphorus-based flame retardant If the amount is less than this range, sufficient flame retardancy will not be exhibited, and if the amount is too large, the operability of nonwoven fabric production which reduces the physical properties inherent in polyester and reduces force will be reduced. Not preferred.
- the nonwoven fabric as the surface material is preferably a polyester-based nonwoven fabric obtained by depositing or sputtering metal on the fiber surface.
- Common metals such as aluminum, chromium, titanium, and SUS can be used as the metal deposited on the fiber surface. It is desirable that the thickness of the deposited metal be 100 1000A. More preferably, it is 200 500A. If the thickness of the vapor-deposited metal is less than 100 A, it does not exhibit sufficient flame retardancy, and if it is more than 100 A, it has flame retardancy. If the thickness of the deposited metal exceeds 1000A, the performance will not be much different and will only increase the price.
- the surface of the fiber constituting the nonwoven fabric with metal, it is possible to suppress not only the flame retardancy but also the decrease in dust releasability due to the electrification of the particles.
- the nonwoven fabric A which is a component of the composite nonwoven fabric used in the present invention, is preferably made of fibers having a fiber diameter of 7 to 20 ⁇ m. Since the fiber diameter is between 7 and 20 ⁇ , high filtration accuracy can be achieved without setting a high packing density. If the fiber diameter is smaller than 7 / m, there is a problem that fluff is likely to occur due to abrasion and the like. In addition, if the fiber diameter is increased to increase the rigidity, when used as a filter, the filling rate must be increased, and the filtration accuracy cannot be set high, resulting in an increase in fluid permeation resistance. .
- the composite nonwoven fabric of the present invention When used as a filter, it is generally considered that the composite nonwoven fabric is used as a surface filtration material having the nonwoven fabric A as a filtration surface.Thus, the smaller the fiber diameter, the higher the filtration accuracy. In addition, the surface is easily smoothed, so that the cake releasability is improved and the filtration life can be extended.
- a composite structure is not employed as in the present invention, it is considered extremely difficult to obtain a nonwoven fabric having a high rigidity with a good balance between filtration accuracy and filtration life. It is particularly preferable that the nonwoven fabric is a long-fiber nonwoven fabric because there is no fear of the fibers falling off when used as a filter or a shielding material.
- the nonwoven fabric A is preferably a nonwoven fabric having a basis weight of 10 to 100 g / m 2 . More preferably, it is in the range of 20-80 g / m 2 .
- Basis weight is fiber interstices of the surface is less than 10 g / m 2 It becomes large and dust penetrates into the inside of the non-woven fabric, causing clogging.
- Nonwoven fabric B which is a component of the composite nonwoven fabric used in the present invention, has a sheath component having a melting point of 110. It is desirable that the core-sheath type conjugate fiber be a polyester having a low melting point between C and 250 ° C and a polyester having a core component having a melting point of 180 ° C and 300 ° C. With this configuration, it is possible to provide a rigid nonwoven fabric and a filter using the same, which are the objects of the present invention. If the nonwoven fabric is a long-fiber nonwoven fabric, it is necessary to apply a process oil agent, so that it is possible to eliminate foreign matter.
- long-fiber nonwoven fabrics are particularly suitable for applications such as filters because they have excellent lint-free properties and do not fall off the fibers.
- the polymer used for the sheath component is desirably a low melting point polyester having a melting point between 110 ° C and 250 ° C.
- a melting point of 110 ° C. or less is not preferred because, even at room temperature, there is a possibility that the adhesive strength may be reduced, or the tackiness may be caused to cause problems such as blocking.
- the melting point is higher than 250 ° C, a high bonding temperature is required, and if the surface temperature of the object to be bonded is low, solidification may start immediately and the adhesiveness may decrease or the operability may deteriorate. Less desirable for ,.
- Polyester-based resins are particularly suitable for the market for filter-related applications because they generally generate less foreign matter.
- polypropylene terephthalate, polybutylene terephthalate, aliphatic polyester or block copolymerized polyester, and a copolymer having any of them as a part of the basic skeleton can be suitably used.
- the polymer of the core component is desirably polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate, polylactic acid or a copolymer partially containing any of them. It is particularly preferable that the melting point of these polyester resins is between 180 ° C. and 300 ° C. because of their excellent dimensional stability and mechanical strength at high temperatures. Recently, it has become possible to obtain raw materials from natural ingredients or biotechnology, which is particularly preferable from the viewpoint of environmental conservation. In particular, when a resin having a form stability such as a liquid filter is used, the high rigidity of the polyester fiber is effective.
- the rimer is preferably at least 20 ° C higher than the melting point or softening point of the polymer of the sheath component in view of the operability of the bonding process. If the difference between the melting points is small, it is necessary to strictly control the processing temperature, which requires sophisticated temperature control equipment, and the processing speed must be reduced, which is not preferable.
- the weight ratio of the core component and the sheath component of the composite fiber is preferably about 20:80 70:30, more preferably between 30:70 60:40, and particularly preferably 40:60 55: Between 45. If the sheath component, which is an adhesive component, is less than 30%, it will be difficult to obtain sufficient adhesive strength. On the other hand, if it exceeds 70%, it becomes difficult to control the temperature during the bonding process, and it is not preferable because it causes problems such as the mechanical strength characteristics being easily lowered.
- the fiber diameter of the main fiber constituting the nonwoven fabric B is between 20 and 50 ⁇ m, more preferably between 25 and 50 ⁇ m, particularly preferably between 30 and 50 ⁇ m. 50 zm. If the fiber diameter is smaller than 20 ⁇ m, the area of the bonded portion becomes smaller, and the adhesive strength tends to be reduced, which is not preferable. On the other hand, if the fiber diameter is larger than 50 ⁇ , the unevenness of the formation of the nonwoven fabric increases, which is not preferable.
- nonwoven fabric when the nonwoven fabric is manufactured by the spunbond method, problems such as thread breakage during the spinning process, and fibers adhering or clogging in the ejector for pulling the fiber are liable to occur, causing problems in operability. There were many things.
- non-woven fabrics made of excessively thick fibers have a small amount of fibers, so that unevenness in formation is conspicuous and leads to variations in physical properties. Where the fiber content is low, the rigidity of the nonwoven fabric is insufficient, and the adhesive strength of the nonwoven fabric is undesirably reduced.
- the basis weight of the nonwoven fabric B is between 15 and 200 g / m 2 .
- the basis weight is between 1570 gZm 2 . If the basis weight is less than 15 g / m 2, it is not preferable because it is difficult to obtain an appropriate adhesive force or the shape retention is deteriorated for the above-mentioned reason.
- the basis weight of 7 be greater than Og / m 2 can be high adhesive strength can not be expected so much, when used in the support of the separation membrane, the thickness and weight is large Do connection handleability is lowered, This is less preferable because it tends to cause a problem of increased pressure loss. Also, if the thickness is large, the pleated type fill When used in filters, the number of weave folds is reduced, resulting in a reduced effective filtration area.
- the nonwoven fabric C used in the present invention is desirably a polyester nonwoven fabric having a basis weight of 30 to 200 g / m 2 . More preferably, it is 40-180 g / m 2 , more preferably 100 180 g / m 2 .
- the method for producing the nonwoven fabric is not particularly limited, but a polyester long-fiber nonwoven fabric having high heat resistance and excellent cost performance can be used. Since the nonwoven fabric C is often thicker and has a higher basis weight than other nonwoven fabrics, heat transfer failure may occur when nonwoven fabrics are bonded to each other by heat calendering or the like. In order to prevent this, it is also desirable to preheat the nonwoven fabric C with a rough force and an infrared heater.
- the filter using the composite nonwoven fabric of the present invention has high rigidity, it is desirable that the filter be pleated and then formed into a cartridge. Bending rigidity can be set high by laminating.
- the non-woven fabric B has a low melting point component, the formability of the pleating process is improved, and high-speed rotary fold folding, which is said to be difficult to process with conventional spunbonded non-woven fabrics, as well as reciprocating processing, becomes possible. .
- Pulse control Time control
- Pulse conditions pressure 0.3MPa, interval 2min, injection time 0 Is
- Test powder 10 kinds of JIS test dust
- the evaluation was performed at a heating rate of 20 ° C / min using DSC7 manufactured by PERKIN-ELMER.
- the peak value of the crystal melting at this time is defined as the melting point.
- a non-woven fabric A was a polyethylene terephthalate spunbond non-woven fabric (Toyobo Co., Ltd. 6701 A) having a fiber diameter of about 14 / im and a basis weight of 70 g / m 2 . It is composed of a core-in-sheath composite fiber with isophthalic acid-introduced copolymer (melting point about 130 ° C) as sheath and polyethylene terephthalate with melting point of about 270 ° C as core.
- Spunbond nonwoven fabric ⁇ (basis weight 40 g / m 2 ) was prepared. The core / sheath ratio was 50:50 on a weight basis.
- non-woven fabric C a polyethylene terephthalate spunbond non-woven fabric (6 A31AD manufactured by Toyobo Co., Ltd.) with a fiber diameter of 14 zm and a basis weight of 130 g / m 2 is used as non-woven fabric C. Bonding was performed at 25 kgZcm at a speed of 10 mZ. The bending stiffness of the laminated nonwoven fabric was 0.50 N / 2 cm. The final pressure loss of the laminated nonwoven fabric was 430 Pa. It was processed with a rotary fold folding machine so that non-woven fabric A was on top. It was possible to process without problems at this time.
- Non-woven fabric B was changed to a non-woven fabric with a basis weight of 40 g / m 2 consisting of core-sheath short fibers (Melty 2080 (trade name) manufactured by Nippon Ester Co., Ltd., core melting point of about 200 ° C) with a fiber diameter of about 35 ⁇ m. Except for this, a laminated nonwoven fabric was prepared in the same manner as in Example 1. The bending rigidity of the laminated nonwoven fabric was 0.47 NZ2 cm. The final pressure loss of the laminated nonwoven fabric was 440 Pa. When the nonwoven fabric A was treated with a rotary fold folding machine so that the nonwoven fabric A was on the upper surface, it could be treated without any problem.
- Non-woven fabric A is a polyethylene terephthalate spunbond nonwoven fabric (H6701A, manufactured by Toyo Boseki Co., Ltd.) containing 3000 ppm of a phosphorus-based flame retardant (2-carboxyethyl) phenylphosphinic acid with a fiber diameter of 14 ⁇ m and a basis weight of 70 g / m 2.
- a laminated nonwoven fabric was obtained.
- the bending stiffness of the laminated nonwoven fabric was 0.55 N / 2 cm.
- the final pressure loss of the laminated nonwoven fabric was 440 Pa.
- the flexural rigidity of the laminated nonwoven fabric was 0.49 N / 2 cm.
- the final pressure loss of the laminated nonwoven fabric was 400 Pa.
- the result of self-extinguishing was shown in the evaluation of flame retardancy by L-1096 micro burner method. Further, the removability of dust was good.
- Fiber diameter 14 mu m a polyethylene terephthalate spunbond nonwoven fabric blended with a phosphorus-based flame retardant having a basis weight of 70 g / m 2 (manufactured by Toyobo Co., Ltd. H6701 A) and non-woven fabric A, that the non-woven fabric was deposited to a thickness of 300A by SUS Other than that, a laminated nonwoven fabric was obtained in the same manner as in Example 1. It was. The bending rigidity of the laminated nonwoven fabric was 0.53 N / 2 cm. The final pressure loss of the laminated nonwoven fabric was 400 Pa. When processed by a rotary fold folding machine with nonwoven fabric A facing up, processing was possible without any problems. In addition, the result of self-extinguishing was shown in the evaluation of flame retardancy by the JIS L-1096 micro burner method. Furthermore, the exfoliation of dust was good.
- Copolymerized polyester with isophthalic acid has a sheath component and a melting point of approx. 270.
- a spunbond nonwoven fabric having a fiber diameter of 17 ⁇ m and a basis weight of 240 gZm 2 using polyethylene terephthalate of C as a core component was prepared. This non-woven fabric was adjusted to a fiber filling rate of 30% by a plain calendar at 100 ° C, a set linear pressure of about 25 kgZcm, and a speed of 10 mZ. The bending stiffness of the nonwoven fabric was 0.3 NZ2 cm. The final pressure loss of the nonwoven fabric was 720 Pa, and the life was short.
- a polyethylene terephthalate nonwoven fabric having a fiber diameter of 14 / im and a basis weight of 240 g / m 2 was prepared. This was calendered under the same conditions as in Comparative Example 1. When processed with a rotary fold folding machine where the adhesion of the fibers constituting the nonwoven fabric was weak, delamination occurred and no addition was possible.
- the laminated nonwoven fabric and the filter according to the present invention can provide high rigidity and an improved filter life, can be widely used in all filter applications, and greatly contribute to the industry. is there.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Nonwoven Fabrics (AREA)
- Filtering Materials (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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JP2005516334A JP4543332B2 (ja) | 2003-12-17 | 2004-12-16 | 低圧力損失積層不織布およびフィルター |
Applications Claiming Priority (2)
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JP2003418929 | 2003-12-17 | ||
JP2003-418929 | 2003-12-17 |
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WO2005058458A1 true WO2005058458A1 (ja) | 2005-06-30 |
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PCT/JP2004/018799 WO2005058458A1 (ja) | 2003-12-17 | 2004-12-16 | 低圧力損失積層不織布およびフィルター |
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WO (1) | WO2005058458A1 (ja) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007107126A (ja) * | 2005-10-12 | 2007-04-26 | Toyobo Co Ltd | 積層不織布 |
JP2008000696A (ja) * | 2006-06-23 | 2008-01-10 | Chisso Corp | フィルター用繊維積層体 |
JP2008080275A (ja) * | 2006-09-28 | 2008-04-10 | Japan Vilene Co Ltd | 微塵除去用濾材 |
CN108367219A (zh) * | 2015-12-22 | 2018-08-03 | 东丽株式会社 | 过滤器用纺粘无纺布及其制造方法 |
CN112368067A (zh) * | 2018-06-29 | 2021-02-12 | 三菱制纸株式会社 | 膜分离活性污泥处理用半透膜用支撑体 |
Citations (4)
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JPH08276111A (ja) * | 1995-04-07 | 1996-10-22 | Toyobo Co Ltd | フィルター補強用不織布 |
JPH0924227A (ja) * | 1995-05-09 | 1997-01-28 | Pall Corp | 補強繊維状ウェブ組立体 |
JPH10146510A (ja) * | 1996-11-20 | 1998-06-02 | Toyobo Co Ltd | エレクトレット嵩高二層濾材とその製造方法 |
JPH11179121A (ja) * | 1997-12-24 | 1999-07-06 | Toray Ind Inc | フィルター用基材およびそれからなるフィルター装置 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2001246210A (ja) * | 2000-03-07 | 2001-09-11 | Toyobo Co Ltd | エレクトレットフィルターろ材、エレクトレットフィルター及びエレクトレットフィルターろ材の製造方法 |
JP2003205211A (ja) * | 2001-11-09 | 2003-07-22 | Nitto Denko Corp | 抗菌性エアフィルタろ材およびこれを用いたフィルタユニット |
-
2004
- 2004-12-16 JP JP2005516334A patent/JP4543332B2/ja not_active Expired - Fee Related
- 2004-12-16 WO PCT/JP2004/018799 patent/WO2005058458A1/ja active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH08276111A (ja) * | 1995-04-07 | 1996-10-22 | Toyobo Co Ltd | フィルター補強用不織布 |
JPH0924227A (ja) * | 1995-05-09 | 1997-01-28 | Pall Corp | 補強繊維状ウェブ組立体 |
JPH10146510A (ja) * | 1996-11-20 | 1998-06-02 | Toyobo Co Ltd | エレクトレット嵩高二層濾材とその製造方法 |
JPH11179121A (ja) * | 1997-12-24 | 1999-07-06 | Toray Ind Inc | フィルター用基材およびそれからなるフィルター装置 |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007107126A (ja) * | 2005-10-12 | 2007-04-26 | Toyobo Co Ltd | 積層不織布 |
JP2008000696A (ja) * | 2006-06-23 | 2008-01-10 | Chisso Corp | フィルター用繊維積層体 |
JP2008080275A (ja) * | 2006-09-28 | 2008-04-10 | Japan Vilene Co Ltd | 微塵除去用濾材 |
CN108367219A (zh) * | 2015-12-22 | 2018-08-03 | 东丽株式会社 | 过滤器用纺粘无纺布及其制造方法 |
CN108367219B (zh) * | 2015-12-22 | 2021-03-19 | 东丽株式会社 | 过滤器用纺粘无纺布及其制造方法 |
CN112368067A (zh) * | 2018-06-29 | 2021-02-12 | 三菱制纸株式会社 | 膜分离活性污泥处理用半透膜用支撑体 |
Also Published As
Publication number | Publication date |
---|---|
JP4543332B2 (ja) | 2010-09-15 |
JPWO2005058458A1 (ja) | 2007-12-13 |
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