IL46879A - Method for the manufacture of an electret fibrous filter - Google Patents

Method for the manufacture of an electret fibrous filter

Info

Publication number
IL46879A
IL46879A IL46879A IL4687975A IL46879A IL 46879 A IL46879 A IL 46879A IL 46879 A IL46879 A IL 46879A IL 4687975 A IL4687975 A IL 4687975A IL 46879 A IL46879 A IL 46879A
Authority
IL
Israel
Prior art keywords
film
charging
stretching
charged
corona
Prior art date
Application number
IL46879A
Other languages
English (en)
Other versions
IL46879A0 (en
Original Assignee
Verto Rotterdam Nv
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 Verto Rotterdam Nv filed Critical Verto Rotterdam Nv
Publication of IL46879A0 publication Critical patent/IL46879A0/xx
Publication of IL46879A publication Critical patent/IL46879A/en

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
    • B01D39/08—Filter cloth, i.e. woven, knitted or interlaced material
    • B01D39/083—Filter cloth, i.e. woven, knitted or interlaced material of organic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/10—Filter screens essentially made of metal
    • 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
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
    • B29C71/0081—After-treatment of articles without altering their shape; Apparatus therefor using an electric field, e.g. for electrostatic charging
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/42—Formation of filaments, threads, or the like by cutting films into narrow ribbons or filaments or by fibrillation of films or filaments
    • D01D5/423—Formation of filaments, threads, or the like by cutting films into narrow ribbons or filaments or by fibrillation of films or filaments by fibrillation of films or filaments
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G7/00—Capacitors in which the capacitance is varied by non-mechanical means; Processes of their manufacture
    • H01G7/02—Electrets, i.e. having a permanently-polarised dielectric
    • H01G7/021—Electrets, i.e. having a permanently-polarised dielectric having an organic dielectric
    • H01G7/023—Electrets, i.e. having a permanently-polarised dielectric having an organic dielectric of macromolecular compounds
    • 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
    • B01D2239/069—Special geometry of layers
    • B01D2239/0695—Wound 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
    • B01D2239/10—Filtering material manufacturing
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/47—Processes of splitting film, webs or sheets
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/48—Processes of making filters

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Textile Engineering (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Filtering Materials (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Electrostatic Separation (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Nonwoven Fabrics (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
IL46879A 1974-03-25 1975-03-20 Method for the manufacture of an electret fibrous filter IL46879A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7403975.A NL160303C (nl) 1974-03-25 1974-03-25 Werkwijze voor het vervaardigen van een vezelfilter.

Publications (2)

Publication Number Publication Date
IL46879A0 IL46879A0 (en) 1975-05-22
IL46879A true IL46879A (en) 1977-07-31

Family

ID=19821033

Family Applications (1)

Application Number Title Priority Date Filing Date
IL46879A IL46879A (en) 1974-03-25 1975-03-20 Method for the manufacture of an electret fibrous filter

Country Status (16)

Country Link
US (3) US3998916A (xx)
JP (1) JPS5647299B2 (xx)
BE (1) BE827077A (xx)
CA (1) CA1050481A (xx)
DD (1) DD117038A5 (xx)
DE (1) DE2512885C2 (xx)
EG (1) EG11559A (xx)
ES (1) ES435841A1 (xx)
FR (1) FR2265805B1 (xx)
GB (1) GB1469740A (xx)
IL (1) IL46879A (xx)
IT (1) IT1030422B (xx)
NL (1) NL160303C (xx)
PL (1) PL95618B1 (xx)
SE (1) SE415959B (xx)
ZA (1) ZA751832B (xx)

Families Citing this family (201)

* Cited by examiner, † Cited by third party
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NL160303C (nl) 1974-03-25 1979-10-15 Verto Nv Werkwijze voor het vervaardigen van een vezelfilter.
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FR2265805B1 (xx) 1982-02-19
JPS50132223A (xx) 1975-10-20
SE7503481L (xx) 1975-09-26
DE2512885C2 (de) 1982-12-09
IT1030422B (it) 1979-03-30
DE2512885A1 (de) 1975-10-02
EG11559A (en) 1977-08-15
USRE30782E (en) 1981-10-27
GB1469740A (en) 1977-04-06
ES435841A1 (es) 1977-02-16
ZA751832B (en) 1976-02-25
IL46879A0 (en) 1975-05-22
BE827077A (nl) 1975-07-16
NL160303B (nl) 1979-05-15
DD117038A5 (xx) 1975-12-20
US3998916A (en) 1976-12-21
USRE32171E (en) 1986-06-03
JPS5647299B2 (xx) 1981-11-09
FR2265805A1 (xx) 1975-10-24
CA1050481A (en) 1979-03-13
NL160303C (nl) 1979-10-15
SE415959B (sv) 1980-11-17
PL95618B1 (pl) 1977-10-31
NL7403975A (nl) 1975-09-29

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