EP1513590A1 - Atemschutzfilter und verfahren zu dessen herstellung - Google Patents
Atemschutzfilter und verfahren zu dessen herstellungInfo
- 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
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 230000029058 respiratory gaseous exchange Effects 0.000 title abstract description 3
- 230000000241 respiratory effect Effects 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims 1
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000011149 active material Substances 0.000 description 1
- 239000002318 adhesion promoter Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10304216 | 2003-01-30 | ||
DE10304216A DE10304216B3 (de) | 2003-01-30 | 2003-01-30 | Atemschutzfilter und Verfahren zu dessen Herstellung |
PCT/DE2003/004266 WO2004067094A1 (de) | 2003-01-30 | 2003-12-19 | Atemschutzfilter und verfahren zu dessen herstellung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1513590A1 true EP1513590A1 (de) | 2005-03-16 |
EP1513590B1 EP1513590B1 (de) | 2011-08-03 |
Family
ID=32797311
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03815530A Expired - Lifetime EP1513590B1 (de) | 2003-01-30 | 2003-12-19 | Atemschutzfilter und verfahren zu dessen herstellung |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1513590B1 (de) |
AT (1) | ATE518567T1 (de) |
AU (1) | AU2003296551A1 (de) |
DE (1) | DE10304216B3 (de) |
WO (1) | WO2004067094A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008148151A1 (en) * | 2007-06-08 | 2008-12-11 | Compumedics Medical Innovation Pty Ltd | Cpap filter |
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)
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 |
-
2003
- 2003-01-30 DE DE10304216A patent/DE10304216B3/de not_active Expired - Fee Related
- 2003-12-19 EP EP03815530A patent/EP1513590B1/de not_active Expired - Lifetime
- 2003-12-19 AT AT03815530T patent/ATE518567T1/de active
- 2003-12-19 WO PCT/DE2003/004266 patent/WO2004067094A1/de not_active Application Discontinuation
- 2003-12-19 AU AU2003296551A patent/AU2003296551A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO2004067094A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP1513590B1 (de) | 2011-08-03 |
ATE518567T1 (de) | 2011-08-15 |
WO2004067094A1 (de) | 2004-08-12 |
AU2003296551A1 (en) | 2004-08-23 |
DE10304216B3 (de) | 2004-10-14 |
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