GB1539331A - Process of forming filter elements using non-woven webs and products thereof - Google Patents

Process of forming filter elements using non-woven webs and products thereof

Info

Publication number
GB1539331A
GB1539331A GB370/77A GB37077A GB1539331A GB 1539331 A GB1539331 A GB 1539331A GB 370/77 A GB370/77 A GB 370/77A GB 37077 A GB37077 A GB 37077A GB 1539331 A GB1539331 A GB 1539331A
Authority
GB
United Kingdom
Prior art keywords
products
filter elements
woven webs
forming filter
forming
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB370/77A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pall Corp
Original Assignee
Pall Corp
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
Priority claimed from US05/649,001 external-priority patent/US4112159A/en
Application filed by Pall Corp filed Critical Pall Corp
Publication of GB1539331A publication Critical patent/GB1539331A/en
Expired legal-status Critical Current

Links

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
    • D04H1/54—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
    • D04H1/56—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 in association with fibre formation, e.g. immediately following extrusion of staple fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
    • B01D25/22—Cell-type filters
    • B01D25/24—Cell-type roll filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/111—Making filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13—Supported filter elements
    • B01D29/23—Supported filter elements arranged for outward flow filtration
    • 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
    • B01D39/163—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin sintered or bonded
    • 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
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2003—Glass or glassy material
    • B01D39/2017—Glass or glassy material the material being filamentary or fibrous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/18—Filters characterised by the openings or pores
    • B01D2201/182—Filters characterised by the openings or pores for depth filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B01D2239/0414—Surface modifiers, e.g. comprising ion exchange groups
    • B01D2239/0428—Rendering the filter material hydrophobic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B01D2239/0464—Impregnants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/065—More than one layer present in the filtering material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/065—More than one layer present in the filtering material
    • B01D2239/0654—Support layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/065—More than one layer present in the filtering material
    • B01D2239/0681—The layers being joined by gluing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/069—Special geometry of layers
    • B01D2239/0695—Wound layers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1043—Subsequent to assembly
    • Y10T156/1049—Folding only

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Filtering Materials (AREA)
  • Nonwoven Fabrics (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Filtration Of Liquid (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
GB370/77A 1976-01-14 1977-01-06 Process of forming filter elements using non-woven webs and products thereof Expired GB1539331A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/649,001 US4112159A (en) 1973-08-31 1976-01-14 Continuous production of tubular modular filter elements using nonwoven webs from thermoplastic fibers and products

Publications (1)

Publication Number Publication Date
GB1539331A true GB1539331A (en) 1979-01-31

Family

ID=24603082

Family Applications (1)

Application Number Title Priority Date Filing Date
GB370/77A Expired GB1539331A (en) 1976-01-14 1977-01-06 Process of forming filter elements using non-woven webs and products thereof

Country Status (22)

Country Link
US (1) US4116738A (enExample)
JP (1) JPS52107677A (enExample)
AT (1) AT360766B (enExample)
AU (1) AU510425B2 (enExample)
BE (1) BE850368A (enExample)
BR (1) BR7700241A (enExample)
CA (1) CA1063946A (enExample)
CH (1) CH619375A5 (enExample)
DE (1) DE2701167C2 (enExample)
DK (1) DK149524C (enExample)
ES (1) ES455000A1 (enExample)
FI (1) FI65170C (enExample)
FR (1) FR2338341A1 (enExample)
GB (1) GB1539331A (enExample)
IL (1) IL51212A (enExample)
IT (1) IT1082691B (enExample)
NL (1) NL177001C (enExample)
NO (1) NO149491C (enExample)
NZ (1) NZ183077A (enExample)
PT (1) PT66070B (enExample)
SE (1) SE430758B (enExample)
ZA (1) ZA7769B (enExample)

Families Citing this family (63)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4475972A (en) * 1981-10-01 1984-10-09 Ontario Research Foundation Implantable material
US4731215A (en) * 1982-06-07 1988-03-15 Biax Fiberfilm Corporation Process for forming non-woven webs from highly oriented melt blown fibers
US4847125A (en) * 1982-06-07 1989-07-11 Biax Fiberfilm Corporation Tube of oriented, heat shrunk, melt blown fibers
US4726901A (en) * 1984-01-06 1988-02-23 Pall Corporation Cylindrical fibrous structures with graded pore size
US4594202A (en) * 1984-01-06 1986-06-10 Pall Corporation Method of making cylindrical fibrous filter structures
US4880002A (en) * 1985-05-30 1989-11-14 Corvita Corporation Stretchable porous sutures
US4712553A (en) * 1985-05-30 1987-12-15 Cordis Corporation Sutures having a porous surface
US4824451A (en) * 1985-12-31 1989-04-25 Kimberly-Clark Corporation Melt-blown filter medium
US4714647A (en) * 1986-05-02 1987-12-22 Kimberly-Clark Corporation Melt-blown material with depth fiber size gradient
US4983292A (en) * 1988-06-27 1991-01-08 Morgan Jr H William Seamless filter bag and method of its manufacture
TW206266B (enExample) * 1991-06-12 1993-05-21 Toray Industries
US5190502A (en) * 1992-02-07 1993-03-02 Dayco Products, Inc. Belt tensioning system, belt tensioner therefor and methods of making the same
US5366576A (en) * 1993-04-14 1994-11-22 Clack Corporation Method for producing tubular products from nonwoven fibers
GB9307710D0 (en) * 1993-04-14 1993-06-02 Rothmans Benson & Hedges Smoking apparatus-l
US5409642A (en) * 1993-10-06 1995-04-25 Exxon Chemical Patents Inc. Melt blowing of tubular filters
US5431829A (en) * 1993-12-16 1995-07-11 Pall Corporation Polymethylpentene filtration medium
US6214143B1 (en) * 1994-05-13 2001-04-10 Johns Mansville International, Inc. Method and apparatus for forming a uniform blanket of synthetic or glass fibers
AU3276895A (en) * 1994-07-28 1996-02-22 Pall Corporation Fibrous web and process of preparing same
US5582907A (en) * 1994-07-28 1996-12-10 Pall Corporation Melt-blown fibrous web
US5591335A (en) * 1995-05-02 1997-01-07 Memtec America Corporation Filter cartridges having nonwoven melt blown filtration media with integral co-located support and filtration
US5639369A (en) * 1995-07-14 1997-06-17 W. L. Gore & Associates, Inc. Filter element
US5827430A (en) * 1995-10-24 1998-10-27 Perry Equipment Corporation Coreless and spirally wound non-woven filter element
US5725812A (en) * 1996-07-08 1998-03-10 Aaf International Melt blowing apparatus and method for forming a fibrous layered web of filter media including a fluid distribution arrangement
US5653833A (en) * 1996-07-25 1997-08-05 Memtec America Corporation Method for integrally joining preformed thermoplastic core elements especially adapted for the continuous manufacture of melt-blown filter cartridges
US5772952A (en) * 1997-02-07 1998-06-30 J&M Laboratories, Inc. Process of making meltblown yarn
US6086696A (en) * 1998-07-21 2000-07-11 The Boeing Company Method of forming a seamless, cylindrical, thermoplastic structure with a multiple compaction roller winder
US6417120B1 (en) 1998-12-31 2002-07-09 Kimberly-Clark Worldwide, Inc. Particle-containing meltblown webs
US6319342B1 (en) 1998-12-31 2001-11-20 Kimberly-Clark Worldwide, Inc. Method of forming meltblown webs containing particles
US6342283B1 (en) 1999-03-30 2002-01-29 Usf Filtration & Separations, Inc. Melt-blown tubular core elements and filter cartridges including the same
US6358417B1 (en) 1999-04-21 2002-03-19 Osmonics, Inc. Non-woven depth filter element
US7168574B2 (en) * 1999-04-22 2007-01-30 King Technology Dual filter
US6446814B1 (en) 1999-04-22 2002-09-10 Joseph A. King Method of making a dual filter
US6494974B2 (en) 1999-10-15 2002-12-17 Kimberly-Clark Worldwide, Inc. Method of forming meltblown webs containing particles
US20020155776A1 (en) * 1999-10-15 2002-10-24 Mitchler Patricia Ann Particle-containing meltblown webs
US6652871B1 (en) * 2000-01-21 2003-11-25 Joseph A. King Delivery system and method of making article
CA2331084C (en) * 2000-01-21 2011-10-25 King Technology, Inc. Water treatment
EP1310287B1 (en) * 2000-07-28 2005-08-31 H. William Morgan, Jr. Method of manufacturing filtration units
US6736274B2 (en) 2001-08-17 2004-05-18 Total Filter Technology, Inc. Nonwoven tubular filter extracting
WO2003035958A1 (en) * 2001-10-23 2003-05-01 Osmonics, Inc. Three-dimensional non-woven media, filter and process
AU784837B2 (en) * 2001-11-13 2006-07-06 William H. Morgan Impregnated micro-fiber filtration unit
US20060031111A9 (en) * 2002-05-30 2006-02-09 Whymark Thomas J Multi-market broadcast tracking, management and reporting method and system
AU2002312402A1 (en) * 2002-06-07 2003-12-22 Parametric Innovations, Inc. Advancing tubular filter products
EP1683432A1 (de) * 2003-04-03 2006-07-26 Hauni Maschinenbau Aktiengesellschaft Verfahren und Vorrichtung zur Herstellung eines Vlieses für die Herstellung von Filterstäben
CA2526394A1 (en) * 2003-06-06 2004-12-23 Pall Corporation Fluid treatment element
US8277654B2 (en) * 2003-11-26 2012-10-02 Selecto, Inc. Water purification apparatus and system
US20060231486A1 (en) * 2005-04-19 2006-10-19 Morgan Howard W Filtration element having a variable density sidewall
KR20060110230A (ko) * 2005-04-19 2006-10-24 윌리엄 모건 하워드 가변성의 밀도 측벽을 가진 필터소자 및 그 제조방법
US20060230727A1 (en) * 2005-04-19 2006-10-19 Morgan Howard W Filtration element having a variable density sidewall
US20070062886A1 (en) * 2005-09-20 2007-03-22 Rego Eric J Reduced pressure drop coalescer
US8114183B2 (en) * 2005-09-20 2012-02-14 Cummins Filtration Ip Inc. Space optimized coalescer
US7674425B2 (en) * 2005-11-14 2010-03-09 Fleetguard, Inc. Variable coalescer
US8231752B2 (en) * 2005-11-14 2012-07-31 Cummins Filtration Ip Inc. Method and apparatus for making filter element, including multi-characteristic filter element
JP5763662B2 (ja) * 2009-10-27 2015-08-12 ダウ グローバル テクノロジーズ エルエルシー 渦巻状巻回型モジュールの外周にテープ層を適用する方法
JP5489084B2 (ja) * 2011-08-12 2014-05-14 Jnc株式会社 混繊長繊維不織布
FR2993475B1 (fr) * 2012-07-19 2015-06-26 Cummins Filtration Sarl Ensemble de filtrage comportant une cartouche de filtration amovible
DE102013111956A1 (de) 2013-10-30 2015-04-30 Egeplast International Gmbh Verfahren zur kontinuierlichen Fertigung von Kunststoffrohren
US10179426B2 (en) 2013-11-06 2019-01-15 Bl Technologies, Inc. Large format melt-blown depth filter cartridge
US11845019B2 (en) 2013-11-06 2023-12-19 Bl Technologies, Inc. Large format melt-blown depth filter cartridge
US20150182895A1 (en) * 2013-12-31 2015-07-02 Bha Altair, Llc Process for making rigid porous plastic tubular filters
US20160023136A1 (en) * 2014-07-28 2016-01-28 Graver Technologies Llc End Plug for Precoat Filter Element
US9260800B1 (en) 2015-02-04 2016-02-16 Thomas M. Tao Melt-blowing apparatus with improved puller device for producing tubular nonwovens
US11266936B2 (en) 2015-04-28 2022-03-08 Bl Technologies, Inc. Melt-blown depth filter element, method and machine of making it
EP4541446A3 (en) * 2017-09-07 2025-06-18 Porex Corporation Small diameter tubular porous fiber filter

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2946449A (en) * 1957-08-15 1960-07-26 Ernest C Shaw Liquid filters
DE1436311A1 (de) * 1964-02-21 1969-07-10 Freudenberg Carl Fa Verfahren zur Herstellung von zylindrischen Filterkoerpern aus Faservliesen
US3354244A (en) * 1964-08-13 1967-11-21 Hudson Engineering Corp Method and apparatus for the manufacture of foamed plastic tubing
GB1104680A (en) * 1965-10-18 1968-02-28 Univ Birmingham Artificial artery
US3498873A (en) * 1965-10-29 1970-03-03 Dow Chemical Co Net structures of multicomponent filaments
US3477892A (en) * 1966-01-21 1969-11-11 Owens Illinois Inc Method and apparatus for forming plastic tubular netting
US3615998A (en) * 1968-07-10 1971-10-26 Celanese Corp Method of biaxially oriented nonwoven tubular material
DE1902533A1 (de) * 1969-01-18 1970-09-10 Bauknecht Gmbh G Entnahmevorrichtung fuer Materialkaesten
DE2111743C3 (de) * 1970-04-02 1973-10-11 Kimikazu Fujisawa Kanagawa Azuma (Japan) Verfahren und Vorrichtung zur Her Stellung von schlauchfbrmigen Schaum stoff Netzen
DE2131236A1 (de) * 1971-06-24 1973-01-11 Domnick Hunter Holdings Mikroporoeser faserfilter
US3801400A (en) * 1972-03-24 1974-04-02 Celanese Corp Varying density cartridge filters
US3933557A (en) * 1973-08-31 1976-01-20 Pall Corporation Continuous production of nonwoven webs from thermoplastic fibers and products
US3905736A (en) * 1973-12-26 1975-09-16 Beloit Corp Sheet web generation via a tubularly formed web
US3909174A (en) * 1973-12-26 1975-09-30 Beloit Corp Continuous tube forming by melt blowing technique
US3905734A (en) * 1973-12-26 1975-09-16 Beloit Corp Continuous tube forming by melt blowing technique
US3929957A (en) * 1975-03-05 1975-12-30 Dayco Corp Method for producing a continuous flexible reinforced tubular conduit

Also Published As

Publication number Publication date
AU510425B2 (en) 1980-06-26
PT66070B (en) 1978-06-23
ATA15777A (de) 1980-06-15
NL7700224A (nl) 1977-07-18
AT360766B (de) 1981-01-26
IL51212A (en) 1980-03-31
FR2338341B1 (enExample) 1982-02-26
BR7700241A (pt) 1977-10-18
DK149524B (da) 1986-07-14
NO770108L (no) 1977-07-15
BE850368A (fr) 1977-07-14
NL177001B (nl) 1985-02-18
JPS52107677A (en) 1977-09-09
NL177001C (nl) 1985-07-16
PT66070A (en) 1977-02-01
FI65170B (fi) 1983-12-30
FR2338341A1 (fr) 1977-08-12
DE2701167C2 (de) 1982-12-16
DK12277A (da) 1977-07-15
ZA7769B (en) 1977-11-30
JPS5635887B2 (enExample) 1981-08-20
NO149491C (no) 1984-05-02
NZ183077A (en) 1979-03-28
US4116738A (en) 1978-09-26
SE430758B (sv) 1983-12-12
NO149491B (no) 1984-01-23
DK149524C (da) 1986-12-15
AU2113677A (en) 1978-07-13
FI770092A7 (enExample) 1977-07-15
SE7700278L (sv) 1977-07-15
CA1063946A (en) 1979-10-09
CH619375A5 (enExample) 1980-09-30
IT1082691B (it) 1985-05-21
FI65170C (fi) 1984-04-10
ES455000A1 (es) 1978-01-01
IL51212A0 (en) 1977-03-31
DE2701167A1 (de) 1977-07-28

Similar Documents

Publication Publication Date Title
PT66070B (en) Continuous production of tubular modular filter elements using nonwoven from termoplastic fibers and products
GB2078271B (en) Method of making nonwoven fabric and product made thereby
ZA79724B (en) Perforated low-density non-woven lofty abrasive product and method of making the same
JPS5354178A (en) Liquid filters and manufacture of same
GB2046572B (en) Filter element and production thereof
IL53660A0 (en) Additive for tobacco products and their filter elements and process for the manufacture of said additive
ZA751190B (en) Non-woven fabric and method of making the same
PH11916A (en) Catalyst and its process of preparation
ZA753687B (en) Method and apparatus for the manufacture of non-woven webs
JPS5383316A (en) Textile product and method of producing same
JPS546973A (en) Novel nonwoven fabric and production thereof
GR63703B (en) Smoke filter and process
JPS53144074A (en) Filter medium made of composite material and production thereof
ZA781704B (en) Process and apparatus for the manufacture of non-woven material
JPS5421414A (en) Fireeresistant* heattgnerating* heattinsulating product and method of making same
NZ185151A (en) Production of mycofungicidal products and their use
GB2000854B (en) Method of after-drying hops and hops product
JPS53146553A (en) Piezooelectric filter and method of producing same
JPS5411378A (en) Nonwoven cloth and production thereof
JPS5427064A (en) Nonwoven cloth like material and production
JPS52121065A (en) Filter and method of producing same
JPS52113912A (en) Process for preparation of butendioll diester and its series of products
JPS5314814A (en) Production of nonwoven cloth
GB1539810A (en) Strong durable nonwoven fabric and method of manufacturing the same
AU496579B2 (en) Method and apparatus forthe manufacture of nonwoven webs

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19950106