WO2005084777A1 - Cartouche de filtre d'extraction reduite - Google Patents

Cartouche de filtre d'extraction reduite Download PDF

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Publication number
WO2005084777A1
WO2005084777A1 PCT/JP2005/003852 JP2005003852W WO2005084777A1 WO 2005084777 A1 WO2005084777 A1 WO 2005084777A1 JP 2005003852 W JP2005003852 W JP 2005003852W WO 2005084777 A1 WO2005084777 A1 WO 2005084777A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter cartridge
nonwoven fabric
melt
polypropylene
less
Prior art date
Application number
PCT/JP2005/003852
Other languages
English (en)
Japanese (ja)
Inventor
Wataru Nomura
Yoshitaka Yamaguchi
Original Assignee
Rokitechno Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rokitechno Co., Ltd. filed Critical Rokitechno Co., Ltd.
Priority to JP2006510761A priority Critical patent/JPWO2005084777A1/ja
Publication of WO2005084777A1 publication Critical patent/WO2005084777A1/fr

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Classifications

    • 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
    • D04H1/42—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 characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4282—Addition polymers
    • D04H1/4291—Olefin series
    • 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

Definitions

  • the present invention relates to a polypropylene filter cartridge used for liquid filtration. More specifically, the present invention has a low elution property with an organic solvent and a small elution amount of salt ion and does not require pre-cleaning. It relates to a filter cartridge.
  • a filter cartridge for liquid filtration is required to have chemical resistance to various solutions, and thus a polypropylene nonwoven fabric excellent in these functions is used as a filter material.
  • a conventional polypropylene-based filter cartridge generally uses a nonwoven fabric formed by melt spinning using a resin polymerized using a Ziegler catalyst.
  • the polypropylene non-woven fabric used for the filter cartridge is a melt-spun polypropylene spunbond, meltblown, or other technique.
  • low-molecular-weight oligomers present in polypropylene are preliminarily immersed and washed with a chlorofluorocarbon-based solvent or a halogen-based solvent in order to reduce the elution property of the filter cartridge. The method of removing is taken.
  • chlorofluorocarbon solvents and halogen solvents have problems of global environmental problems, ozone layer destruction and regulations as global warming substances are strengthened, and processing costs are increased.
  • the present invention has been made in view of such a point, and has a low elution property to an organic solvent and a low chlorine ion elution property, thereby eliminating a cleaning operation before use. It is an object to provide a filter cartridge.
  • the present inventors have conducted intensive studies to achieve the above object.
  • the nonwoven fabric formed by melt spinning of a polypropylene homopolymer polymerized with a meta-aqueous catalyst was obtained by using a non-woven product of oligomer and a salty product.
  • the surprising fact was found that the amount of eluted by the organic solvent was extremely small even without washing with an organic solvent because the contamination with impurities was extremely reduced, and the elution of chloride ions was significantly reduced even without washing with ultrapure water. Reached the present invention.
  • the melt flow rate of the molded nonwoven fabric to an unprecedentedly small value, an unexpected and remarkable effect that the amount of xylene extractables falls below the detection limit is exhibited.
  • the present invention relates to a filter cartridge using a polypropylene resin non-woven fabric, and using a non-woven fabric formed by melt spinning a polypropylene homopolymer polymerized with a meta-mouth catalyst, using xylene.
  • a filter cartridge having a soluble substance of 1% by weight or less and a salt elution ion elution amount of 1% by weight or less is provided.
  • the hexane extract is 1.5% by weight or less, particularly preferably 1% by weight or less.
  • the melt flow rate of the nonwoven fabric formed by the melt spinning method is 450 gZlO or less, the xylene-soluble content of the filter cartridge is below the detection limit (less than 0.5%), and hexane extraction
  • the lower limit of the melt flow rate is preferably set to 100 gZ or more from the viewpoint of ease of production (claim 3).
  • the present invention has a pleated or rolled filter cartridge, and is suitable for use in the field of elect-opening (claim 4).
  • the polypropylene homopolymer nonwoven fabric has a fiber diameter of 0.5 to 50 ⁇ m, and a basis weight of 5 to 200 gZm 2 , particularly preferably 10 to 50 gZm 2 (Claim 5).
  • the present invention uses a nonwoven fabric melt-spun using polypropylene resin polymerized with a meta-mouth catalyst, preferably as a non-conventionally low melt flow rate, for a filter material of a filter and a cartridge. Therefore, the gist of the present invention is that the contamination of the liquid to be filtered is improved, and the elution amount of the organic solvent is reduced to a level that does not require prior cleaning.
  • the amount of oligomers eluted by an organic solvent can be significantly reduced, and the amount of chloride ions eluted into ultrapure water can be significantly reduced.
  • polypropylene resin using a meta-mouth catalyst has improved decomposability due to heat history and is easier to process into fibers, so productivity is improved 2 to 5 times compared to conventional nonwoven fabrics using a Ziegler catalyst. It has an unexpected effect.
  • a cylindrical pleated filter cartridge shown in FIG. 1 and a cylindrical roll filter cartridge shown in FIG. 2 are preferable. Especially in the field of electronics these filters are used.
  • the nonwoven fabric used in the filter cartridge of the present invention uses a nonwoven fabric formed by melt spinning a polypropylene homopolymer polymerized with a meta-mouth catalyst. It is generally known that the amount of xylene extraction and the amount of hexane extraction depend on the crystallinity of polypropylene, and in particular, the higher the crystallinity, the lower the amount of extraction. Therefore, in the case of polypropylene resin, block copolymers and random copolymers have lower crystallinity than homopolymers and therefore have poor organic solvent resistance.
  • a fiber of a polypropylene homopolymer polymerized using a conventional Ziegler catalyst cannot have a melt flow rate of 500 or less, but a polypropylene polymerized using the meta-mouth catalyst of the present invention.
  • Homopolymers can have a melt flow rate of 500 or less.
  • melt flow rate of the polypropylene homopolymer fiber of the present invention By setting the melt flow rate of the polypropylene homopolymer fiber of the present invention to 450 or less, a surprising result that the xylene-soluble content is below the detection limit and the hexane extractable content is 1% by weight or less is obtained.
  • the lower limit of the melt flow rate of the polypropylene homopolymer fiber for obtaining such a result is not particularly limited, but is preferably 100 or more, particularly preferably 200 or more from the viewpoint of ease of production.
  • the fiber diameter of the nonwoven fabric is preferably 0.3 to 50 m force, and 0.8 to 30 m force is particularly preferred! / ⁇ . If the fiber diameter is less than 0.3 ⁇ m, it is practically difficult to form by the melt spinning method. If the fiber diameter is 50 m or more, the filtration accuracy becomes poor.
  • the fiber diameter of the nonwoven fabric formed by the method of the present invention can be much smaller than that of a nonwoven fabric formed by a conventional Ziegler catalyst. If the fiber diameter is reduced, the amount of nonwoven fabric used can be reduced with the same filtration accuracy. Therefore, if a nonwoven fabric having a small fiber diameter is used according to the purpose of use, the amount of elution by the organic solvent and the amount of chloride ion can be further reduced.
  • the filter cartridge according to the present invention has much less extractability and solubility with an organic solvent than conventional ones.
  • the xylene extract and hexane solubles of the nonwoven fabric obtained using conventional polypropylene resin polymerized with Ziegler catalyst were more than 2% by weight.
  • Melt flow rate polymerized with metallocene catalyst 450gZlO Minutes are less than the xylene extract detection limit (less than 0.5% by weight), and hexane solubles are significantly reduced to 1% by weight. With this amount, there is no need for prior cleaning using a conventional fluorocarbon or halogenated solvent.
  • the present invention provides a polypropylene resin polymerized with a meta-mouth catalyst through a pyrolysis process of melt spinning, especially a melt flow rate of 450 g / 10 minutes or less. It was discovered that the generation of oligomers was very low.
  • the dissolution property with an organic solvent is improved to about 1/2 to 1/5 as compared with a fiber made of polypropylene resin polymerized with a conventional Ziegler catalyst. Has been confirmed.
  • the nonwoven fabric formed from the polypropylene resin polymerized with the meta-mouth catalyst of the present invention can reduce the elution amount of chloride ions to about 1Z3 as compared with a nonwoven fabric using a conventional Ziegler catalyst. Confirmed by experiment.
  • meta-mouth resin has a smaller amount of catalyst residues compared to the resin using a conventional Ziegler catalyst, and therefore, when used as a filter material, the formation of metal ions or anions in the liquid to be filtered becomes difficult. It is considered that elution is reduced.
  • the polypropylene homopolymer used in the present invention preferably has a melt flow rate in the range of 10-lOOg ZlO. If the melt flow rate of the polypropylene resin is less than 10 minutes, the viscosity at the time of melting is so high that the processing into fibers during spinning becomes extremely poor. When the melt flow rate exceeds 100 gZlO, the melt spinnability is improved, but it is difficult to reduce the melt flow rate of the fiber to 450 gZlO or less. It is not preferable because the property deteriorates.
  • the melting point of the meta-mouth homopolymer is about 10 ° C lower than that of the Ziegler homopolymer.
  • the yarn temperature may be set low. By setting the melt spinning temperature low, the MFR when fiberized can be reduced to 450 gZlO or less.
  • Melt spinning was performed by a melt blow method using a homopolymer polypropylene resin polymerized with a meta-mouth catalyst and having a melt flow rate of 30 gZlO.
  • melt spinning conditions were as follows: die temperature: 300 ° C (Example 1), 290 ° C (Example 2), 310 ° C (Example 3), 320 ° C (Example 4), pressure the 0. 04MPa, to produce a melt flow rate of the nonwoven fabric described in the following table 1 having a basis weight 30GZm 2 in average fiber fiber diameter 2 m the discharge amount as 50KgZH.
  • a cylindrical pleated filter cartridge shown in Fig. 1 was prepared.
  • melt-blowing was performed under the same melt-spinning conditions as in Example 1 except that the die temperature was set to 300 ° C using a polypropylene homopolymer with a melt flow rate of 30 gZlO polymerized with a Ziegler catalyst.
  • a non-woven fabric was made. The average fiber diameter of the obtained nonwoven fabric was 8 / zm and the basis weight was 30 gZm 2 .
  • a cylindrical pleated filter cartridge shown in FIG. 1 was prepared.
  • Example 2 the polypropylene spinning resin of Comparative Example 1 was used, and the melt spinning conditions were 320 ° C at the die part, the pressure was 0.06 MPa, and the discharge rate was 20 kgZH.
  • a nonwoven fabric having an average fiber diameter of 30 gZm 2 was obtained.
  • a cylindrical pleated filter cartridge shown in Fig. 1 was prepared.
  • Example 2 the same melt spinning as in Example 1 was carried out except that a high MFR resin having a melt flow rate of SlOOOgZlO and a die temperature of 300 ° C was used with a polypropylene homopolymer polymerized with a Ziegler catalyst. Under the conditions, a nonwoven fabric was prepared. A nonwoven fabric having an average fiber diameter of 2 m and a basis weight of 30 gZm 2 was obtained as in Example 1. The cylinder shown in Fig. 1 using this nonwoven fabric A pleated filter cartridge was made.
  • Example 1 From Example 1 and Comparative Example 3, it was found that the productivity for obtaining the same fiber diameter was higher by a factor of 2 to 3 in the meta-mouth resin than in the resin by the Ziegler method.
  • Example 1 As is apparent from a comparison between Example 1 and Comparative Example 2, under the same spinning conditions, in the case of a polypropylene resin using a metallocene catalyst, the fiber diameter is about 1Z4 times that of the Ziegler method resin. Fine force and fiber are obtained.
  • Xylene-soluble matter (% by weight): The total solid content in the filtrate obtained by placing a sample in xylene, heating at 120 ° C for 1 hour, leaving it at 25 ° C for 1 hour, and then filtering off.
  • Hexane extractables (% by weight): The total solid content in the filtrate obtained by placing a sample in hexane, refluxing at a reflux temperature (hexane boiling point 66-69 ° C) for 2 hours, and filtering off.
  • the filter material of the present invention has significantly less elution property to the organic solvent than the filter material melt-spun using the polypropylene resin polymerized with the catalyst.
  • the xylene extract falls below the detection limit and the hexane-soluble content becomes 1.0% by weight or less, so that washing with a fluorocarbon solvent or the like before use is completely unnecessary.
  • the same filtration accuracy can be obtained by using a nonwoven fabric obtained from a polypropylene resin polymerized by a Ziegler catalyst and a metallocene catalyst as long as the fiber diameter is the same from the results in Table 1. It was confirmed that it could be obtained.
  • FIG. 1 is a perspective view showing a cylindrical pleated filter cartridge of the present invention.
  • FIG. 2 is a perspective view showing a cylindrical roll-shaped filter cartridge of the present invention.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Filtering Materials (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

[PROBLEMES] Fournir une cartouche de filtre dont l'extraction est réduite avec des solvants organiques et dans l'extraction d'ions de chlore n'a pas besoin d'opération de nettoyage avant l'utilisation. [MOYENS POUR RESOUDRE LES PROBLEMES] La cartouche de filtre emploie un tissu non tissé fait de résine de polypropylène où le tissu non tissé est formé par le procédé de filage à l'état fondu à partir d'un homopolymère propylène obtenu par la polymérisation avec un catalyseur métallocène et la cartouche présente un contenu soluble de xylène de 1 pour cent en poids ou inférieure et une extraction d'ion de chlorure inférieure ou égale à 1% en poids. Par conséquent, une opération de nettoyage avant l'utilisation n'est pas nécessaire.
PCT/JP2005/003852 2004-03-08 2005-03-07 Cartouche de filtre d'extraction reduite WO2005084777A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006510761A JPWO2005084777A1 (ja) 2004-03-08 2005-03-07 溶出量が少ないフィルターカートリッジ

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2004063295 2004-03-08
JP2004-063295 2004-03-08

Publications (1)

Publication Number Publication Date
WO2005084777A1 true WO2005084777A1 (fr) 2005-09-15

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PCT/JP2005/003852 WO2005084777A1 (fr) 2004-03-08 2005-03-07 Cartouche de filtre d'extraction reduite

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JP (1) JPWO2005084777A1 (fr)
WO (1) WO2005084777A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2801863A1 (fr) * 2013-05-07 2014-11-12 Shin-Etsu Chemical Co., Ltd. Procédé de production de composition de réserve
EP3042990A1 (fr) 2010-11-16 2016-07-13 Adeka Corporation Procédé de stabilisation à long terme d'un polymère, procédé de fabrication d'un tissu non tissé et procédé de production d'une composition élastomère
WO2018230386A1 (fr) 2017-06-13 2018-12-20 株式会社クラレ Fibres à faible lixiviabilité et structure fibreuse

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62155912A (ja) * 1985-12-28 1987-07-10 Toyo Roshi Kk 精密濾過用フイルタ−エレメント
JPH03234853A (ja) * 1990-02-08 1991-10-18 Mitsui Petrochem Ind Ltd 不織布構造物及びその製法
JP2001214327A (ja) * 2000-12-05 2001-08-07 Toyobo Co Ltd エレクトレット化ポリオレフィン繊維
JP2001300224A (ja) * 2000-04-26 2001-10-30 Chisso Corp フィルターカートリッジ
JP2003522853A (ja) * 2000-02-18 2003-07-29 アトフイナ・リサーチ・ソシエテ・アノニム ポリプロピレン繊維

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62155912A (ja) * 1985-12-28 1987-07-10 Toyo Roshi Kk 精密濾過用フイルタ−エレメント
JPH03234853A (ja) * 1990-02-08 1991-10-18 Mitsui Petrochem Ind Ltd 不織布構造物及びその製法
JP2003522853A (ja) * 2000-02-18 2003-07-29 アトフイナ・リサーチ・ソシエテ・アノニム ポリプロピレン繊維
JP2001300224A (ja) * 2000-04-26 2001-10-30 Chisso Corp フィルターカートリッジ
JP2001214327A (ja) * 2000-12-05 2001-08-07 Toyobo Co Ltd エレクトレット化ポリオレフィン繊維

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3042990A1 (fr) 2010-11-16 2016-07-13 Adeka Corporation Procédé de stabilisation à long terme d'un polymère, procédé de fabrication d'un tissu non tissé et procédé de production d'une composition élastomère
KR20190025743A (ko) 2010-11-16 2019-03-11 가부시키가이샤 아데카 폴리머의 장기 안정화 방법 및 부직포, 일래스터머 조성물의 제조 방법
EP2801863A1 (fr) * 2013-05-07 2014-11-12 Shin-Etsu Chemical Co., Ltd. Procédé de production de composition de réserve
US9201301B2 (en) 2013-05-07 2015-12-01 Shin-Etsu Chemical Co., Ltd. Method for producing resist composition
WO2018230386A1 (fr) 2017-06-13 2018-12-20 株式会社クラレ Fibres à faible lixiviabilité et structure fibreuse

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Publication number Publication date
JPWO2005084777A1 (ja) 2008-01-17

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