EP1513590A1 - Filtre de protection respiratoire et procede de fabrication dudit filtre - Google Patents

Filtre de protection respiratoire et procede de fabrication dudit filtre

Info

Publication number
EP1513590A1
EP1513590A1 EP03815530A EP03815530A EP1513590A1 EP 1513590 A1 EP1513590 A1 EP 1513590A1 EP 03815530 A EP03815530 A EP 03815530A EP 03815530 A EP03815530 A EP 03815530A EP 1513590 A1 EP1513590 A1 EP 1513590A1
Authority
EP
European Patent Office
Prior art keywords
filter
filter body
filter housing
respiratory protection
shaped
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.)
Granted
Application number
EP03815530A
Other languages
German (de)
English (en)
Other versions
EP1513590B1 (fr
Inventor
Andreas Haeuser
Keith KRÜGEL
Wilfried Hoffmann
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.)
MSA Auer GmbH
Original Assignee
MSA Auer GmbH
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 MSA Auer GmbH filed Critical MSA Auer GmbH
Publication of EP1513590A1 publication Critical patent/EP1513590A1/fr
Application granted granted Critical
Publication of EP1513590B1 publication Critical patent/EP1513590B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B23/00—Filters for breathing-protection purposes
    • A62B23/02—Filters for breathing-protection purposes for respirators

Definitions

  • the invention relates to a respiratory protection filter consisting of a solid filter body formed under the action of pressure and heat from a sorptive and a fusible material, which is fixed in an edge-tight manner in a filter housing, and a method for producing the same.
  • DE 197 14 350 A1 discloses a method for producing a respiratory protection filter in which a fine-grained, sorptive or catalytically active material is mixed with a meltable polyethylene which is intensively wetted with an oligo-condensate, and the mixture is mixed at certain temperatures and pressing to a shaped body, cooled in the mold and then removed from the mold. Apart from the elaborate cooling and
  • De-molding process poses difficulties for the further use of the filter molded body produced in this way, in particular in that a secure seal between the inner wall of a filter housing in which the filter body is inserted and the filter body is not guaranteed, or the gas-tight integration of the filter body into the filter housing by means of a non-positive adhesive Connection requires a considerable technical effort and, as soon as the filter performance is exhausted, the filter body including the filter housing and connections must be disposed of.
  • the limited mechanical stability in the edge region of the shaped filter body also prevents simple further processing of the shaped filter body and the edge-tight integration into the filter housing.
  • DE 100 21 582 A1 proposes to press the mixture of the sorptive and the fusible material directly in an annular connecting part at the temperatures and pressures required for the production of the filter molded body. This creates an edge-tight connection between the inner surface of the connection part and the circumferential surface of the shaped filter body.
  • the connecting part is connected in a gastight manner to an adapter and can then be connected to a respirator mask or to a blower filter device or - provided with a mouthpiece - can be used directly as a respirator filter for a user.
  • connection part which, when the filter is used up, is also disposed of. Since the adapter provided for connection to the respiratory filter device or the blower filter device or provided with a mouthpiece has to be connected to the connecting part in a force-fitting manner because of the required tightness and is therefore also not recyclable, the effort for the production and disposal of the respiratory protection filter is high considerable.
  • the invention is therefore based on the object of developing a breathing protection filter of the type mentioned at the outset, which is inexpensive in terms of production, use and disposal or recycling.
  • Filter body is a conically shaped, separate filter molded body produced in a molding tool, which is interchangeably housed in a filter housing with the same taper as that of the filter molded body and is held in the housing in an edge-tight manner with a press-in device connected to the filter housing.
  • This means that the molded filter body can be easily removed from the mold and gently - without edge damage - placed in a reusable filter housing and temporarily, ie detachably, fixed in it and thus easily replaced after the filter capacity has been exhausted. This significantly reduces costs.
  • Another important feature of the invention is, moreover, that the production of the shaped filter body takes place in a pocket corresponding to the finished shape of an air-permeable thin-layer material, in particular a fleece.
  • the still free surface can be covered with an air-permeable material, so that the filter molded body is completely surrounded by an air-permeable covering that is firmly connected to the filter material. This further facilitates demolding and the surface of the molded part
  • the lateral area of the air-permeable coating material is coated with an air-impermeable material. This allows the gas tightness at the peripheral edge of the Filter housing inserted filter body can be guaranteed even at low injection pressure.
  • the press-in device is a screw ring which can be screwed onto the gas inlet side of the filter housing and which has a press ring which is directed into the interior of the filter housing and is supported on the shaped filter body.
  • the screw ring By turning the screw ring, the conical circumferential surface of the shaped filter body can be placed gently against the conical inner circumferential surface of the filter housing until the edge tightness is achieved. After removing the screw ring, a used shaped filter body can easily be removed from the filter housing.
  • a mixture of a fine-grained sorptive material and a finely divided, meltable polyethylene is first produced with the addition of an adhesion promoter based on oligocondensate.
  • pockets made of an air-permeable nonwoven material are also provided in a deep-drawing process. After the fleece pocket has been placed in a mold of the same shape, the mixture described above is poured into the fleece pocket and, after a fleece cover has been placed on the remaining free surface, pressed under certain temperature and pressure conditions in the fleece pocket delimited by the mold.
  • the filter body can be easily removed from the mold and transported without damaging its surface and installed in a filter housing. De-molding is further facilitated in that the molding tool and the filter molding are conical.
  • the shaped filter body is now placed in a likewise conical filter housing with the same taper as that of the shaped filter body and gradually pressed in until the non-woven material in the contact area with the inner wall of the filter housing is gas-tightly integrated by pressing in and possibly compressing the nonwoven-coated conical shaped filter body in the conical filter housing is guaranteed.
  • the shaped filter body is releasably fixed in order to be easily removed and disposed of when the filter capacity is exhausted.
  • An important effect of the nonwoven covering is to improve the lubricity of the shaped filter body in the filter housing both during assembly and during disassembly.
  • the drawing shows a sectional view of the respiratory protection filter 1 produced and designed according to the method according to the invention, which comprises a reusable, conically tapering filter housing 2 and a shaped filter body 3 which has the shape of a circular truncated cone.
  • the filter housing 2 has a connection piece 4 on the air outlet side (suction side), via which the respiratory protection filter 1 is connected directly to a mouthpiece or to a respiratory mask or a blower filter device (not shown in each case).
  • the shaped filter body 3 is completely surrounded by a covering 5 made of a nonwoven.
  • an external thread 6 is formed, into which the thread of a Screw ring 7 engages.
  • the screw ring 7 has a press ring 8 pointing towards the inside of the filter housing 2, which is supported on the filter shaped body 3 and, when the screw ring 7 is turned, gas-tight (edge-tight) into the filter housing 2 or with its outer surface on the inner peripheral surface of the filter housing 2 presses.
  • the sealing effect of the covering 5, which acts as a lubricant and sealant on the lateral circumferential surface of the shaped filter body 3, can be improved by an airtight impregnation (coating) applied in this area of the covering 5.
  • Respiratory protection filter Filter housing Filter molded body Connection piece Air-permeable covering External thread of 2 7 screw ring Press ring

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • External Artificial Organs (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
EP03815530A 2003-01-30 2003-12-19 Filtre de protection respiratoire et procede de fabrication dudit filtre Expired - Lifetime EP1513590B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10304216A DE10304216B3 (de) 2003-01-30 2003-01-30 Atemschutzfilter und Verfahren zu dessen Herstellung
DE10304216 2003-01-30
PCT/DE2003/004266 WO2004067094A1 (fr) 2003-01-30 2003-12-19 Filtre de protection respiratoire et procede de fabrication dudit filtre

Publications (2)

Publication Number Publication Date
EP1513590A1 true EP1513590A1 (fr) 2005-03-16
EP1513590B1 EP1513590B1 (fr) 2011-08-03

Family

ID=32797311

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03815530A Expired - Lifetime EP1513590B1 (fr) 2003-01-30 2003-12-19 Filtre de protection respiratoire et procede de fabrication dudit filtre

Country Status (5)

Country Link
EP (1) EP1513590B1 (fr)
AT (1) ATE518567T1 (fr)
AU (1) AU2003296551A1 (fr)
DE (1) DE10304216B3 (fr)
WO (1) WO2004067094A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008148151A1 (fr) * 2007-06-08 2008-12-11 Compumedics Medical Innovation Pty Ltd Filtre à pression positive continue (cpap)
US9440775B2 (en) * 2014-05-22 2016-09-13 3M Innovative Properties Company Prefilter cover for bidirectional-airflow respirator cartridge
US20210370106A1 (en) 2020-06-02 2021-12-02 Dräger Safety AG & Co. KGaA Filter unit with a rigid filter and a flexible jacket and methods for manufacturing such a filter

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB523240A (en) * 1938-09-05 1940-07-09 Jaroslav Jan Pala Improvements in or relating to gas-protective filters
US2744525A (en) * 1953-01-15 1956-05-08 Chicago Eye Shield Company Respirator
YU40104B (en) * 1973-07-04 1985-08-31 Pirelli Housing of filter masks for respiration
FR2322617A1 (fr) * 1975-09-04 1977-04-01 Arbel Industrie Masque respiratoire a cartouches filtrant l'air ambiant
US4601287A (en) * 1981-04-01 1986-07-22 Royce Jr George H Heated survival face mask
US5078132A (en) * 1985-08-28 1992-01-07 Minnesota Mining And Manufacturing Company Bonded adsorbent structures and respirators incorporating same
US4883547A (en) * 1987-03-02 1989-11-28 Minnesota Mining And Manufacturing Company Method of forming a high efficiency respirator
US6277178B1 (en) * 1995-01-20 2001-08-21 3M Innovative Properties Company Respirator and filter cartridge
US6216693B1 (en) * 1995-01-20 2001-04-17 3M Innovative Properties Company Respirator having a compressible press fir filter element
FR2750869B1 (fr) * 1996-07-11 1998-11-06 Commeinhes Remco Appareil respiratoire a fonctionnement en circuit ferme
DE19714350B4 (de) * 1997-03-26 2004-12-02 Auergesellschaft Gmbh Polymergebundenes körniges ad-, ab-, chemisorptiv oder katalytisch wirkendes Material und Verfahren zur Herstellung von Formkörpern aus diesem Material
DE10021582B4 (de) * 2000-04-27 2004-07-15 Auergesellschaft Gmbh Verfahren und Vorrichtung zur Herstellung eines Atemschutzfilters

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004067094A1 *

Also Published As

Publication number Publication date
AU2003296551A1 (en) 2004-08-23
ATE518567T1 (de) 2011-08-15
WO2004067094A1 (fr) 2004-08-12
DE10304216B3 (de) 2004-10-14
EP1513590B1 (fr) 2011-08-03

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