CA1328827C - Expanded polytetrafluoroethylene tubular container - Google Patents
Expanded polytetrafluoroethylene tubular containerInfo
- Publication number
- CA1328827C CA1328827C CA000605451A CA605451A CA1328827C CA 1328827 C CA1328827 C CA 1328827C CA 000605451 A CA000605451 A CA 000605451A CA 605451 A CA605451 A CA 605451A CA 1328827 C CA1328827 C CA 1328827C
- Authority
- CA
- Canada
- Prior art keywords
- container
- adsorbent
- sealed
- tubular structure
- tube
- 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 - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/261—Drying gases or vapours by adsorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/0407—Constructional details of adsorbing systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/104—Alumina
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/106—Silica or silicates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/106—Silica or silicates
- B01D2253/108—Zeolites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/20—Organic adsorbents
- B01D2253/202—Polymeric adsorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/30—Physical properties of adsorbents
- B01D2253/302—Dimensions
- B01D2253/304—Linear dimensions, e.g. particle shape, diameter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/30—Physical properties of adsorbents
- B01D2253/302—Dimensions
- B01D2253/308—Pore size
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/80—Water
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
- Separation Of Gases By Adsorption (AREA)
Abstract
ABSTRACT
A container for adsorbing components present in an environment, which comprises a tubular structure of expanded, porous polytetrafluoroethylene sealed at both ends, so as to encapsulate an adsorbent present with the tubular structure.
A container for adsorbing components present in an environment, which comprises a tubular structure of expanded, porous polytetrafluoroethylene sealed at both ends, so as to encapsulate an adsorbent present with the tubular structure.
Description
132~827 -i FIELD OF THE INVENTION
This invention relates to a novel tubular container having an adsorbent material inside, and more specifically, to a novel container having very small pores in its walls that allow it to be ~ permeable to gases, selected liquids and solutes, but impermeable `I to other larger size materials and other selected liquids.
'1 .
BACKGROUND OF THE INVENTION
~, Contatners that conta~n adsorbents to remove vaporous impurit1es in the atmosphere are well known. For e~ample, they can be used to remove water vapor from air to obtain or maintain a dry atmosphere in appl~cations where a mo1sture-free atmosphere ~s ~mportant, as for example 1n keep~ng hygroscop1c materials dry.
~, Another example ~s the removal of organic vapors from air to avoid ~ contamination of local env1ronments sensltive to such vapors, as - for example in preventing head (st1ct~on) failures ~n computer dlsk dr~ves.
It is well known that greater effect~veness in remov~ng of material from the atmosphere by adsorpt10n can be obtained if the surface area of the adsorbent ls max~mlzed. Thus the smaller the adsorbent materlals ln particle s~ze, the greater the effect~veness ~n remov~ng 1mpurit~es. Unfortunately, the smaller the partkle s1ze, the greater amount of dust-llke fines that can be present. Moreover, even coarse adsorbent materials generate f1nes by mutual abras~on of the coarse granules.
~ To protect the adsorbent part~cles, a protect~ve porous :~ materlal 1.e., a material that permlts passage through tt of gaseous components or other components is usually employed to surround and encase the adsorbent. But ~f the pores of the protective materlal are too large, the f1nes of the adsorbant mater~al will escape through the pores and contaminate the outside env1ronment. To prevent such escape, 1t ls deslrable for the protect~ve covering to have pores small enough to prevent escape of very small dtameter fines, ~.e., f~nes on the order of 10 ~ m~crons, or even 1 m1cron or less 1n slze.
"'1 ~a ,~
,~1 ~ ~ ",;; ~ - .,"~,. ." ~
This invention relates to a novel tubular container having an adsorbent material inside, and more specifically, to a novel container having very small pores in its walls that allow it to be ~ permeable to gases, selected liquids and solutes, but impermeable `I to other larger size materials and other selected liquids.
'1 .
BACKGROUND OF THE INVENTION
~, Contatners that conta~n adsorbents to remove vaporous impurit1es in the atmosphere are well known. For e~ample, they can be used to remove water vapor from air to obtain or maintain a dry atmosphere in appl~cations where a mo1sture-free atmosphere ~s ~mportant, as for example 1n keep~ng hygroscop1c materials dry.
~, Another example ~s the removal of organic vapors from air to avoid ~ contamination of local env1ronments sensltive to such vapors, as - for example in preventing head (st1ct~on) failures ~n computer dlsk dr~ves.
It is well known that greater effect~veness in remov~ng of material from the atmosphere by adsorpt10n can be obtained if the surface area of the adsorbent ls max~mlzed. Thus the smaller the adsorbent materlals ln particle s~ze, the greater the effect~veness ~n remov~ng 1mpurit~es. Unfortunately, the smaller the partkle s1ze, the greater amount of dust-llke fines that can be present. Moreover, even coarse adsorbent materials generate f1nes by mutual abras~on of the coarse granules.
~ To protect the adsorbent part~cles, a protect~ve porous :~ materlal 1.e., a material that permlts passage through tt of gaseous components or other components is usually employed to surround and encase the adsorbent. But ~f the pores of the protective materlal are too large, the f1nes of the adsorbant mater~al will escape through the pores and contaminate the outside env1ronment. To prevent such escape, 1t ls deslrable for the protect~ve covering to have pores small enough to prevent escape of very small dtameter fines, ~.e., f~nes on the order of 10 ~ m~crons, or even 1 m1cron or less 1n slze.
"'1 ~a ,~
,~1 ~ ~ ",;; ~ - .,"~,. ." ~
SUMMARY OF THE INVENTION
This invention provides an adsorbent-containing device having such a protective covering. The device comprises a contatner for selectively adsorbing gaseous components present in an environment, which container comprises a tubular structure of expanded, porous polytetrafluoroethylene, said tubular structure being sealed at both ends, so as to encapsulate an adsorbent present within the tubular structure, the pores of said porous polytetrafluoroethylene having an average size of between about 0.1 and 1 micron, with substantially no pores greater than 5 micron in size.
..-DESCRIPTION OF THE DRAWINGS
F~gure 1 depicts an embodiment of the tubular container of the present invention, cut away to expose the interior of the tubular . container with adsorbent particles inside.
Figure 2 is a vlew of the tubular container cut along l~ne 2-2 of Figure 1, but without having any adsorbent particles inside.
DESCRIPTION OF THE INVENTION
~ ~ . .
~ : . .
;~ Refering to the Figures, the tubular container of the ; ~ invention compr~ses a tube 10 made of expanded porous polytetrafluoroethylene sealed at each end 11 so as to enclose adsorbent partkles 12.
The tube can be slightly to very flex~ble, depending on the strength of the polytetrafluoroethylene and the thickness of the walls. For most applications, the wall thlckness will be between 10 and 50 m~ls (250-1250 micron) on average. The expanded porous polytetrafluoroethylene tube is made accord1ng to the procedures descr1bed in U.S. Patents 4,110,392, 4,187,390, 4,075,679 and 3,953,566. More specifically, coagulated dispersion polytetrafluoroethylene (PTFE) is lightly lubricated and extruded as a paste through an annular-dle extruder. In a series of , ., : ~;;
~, ~ .
~328827 ~.
, heating and stretching steps the lubricant is evaporated away and the PTFE structure is expanded such that the percent void space or porosity is finally about 30-80%. The resulting tube is s~ntered by heating above the crystalline melt temperature of PTFE. Under ~i one set of condltions such a tube ~s made having an inside d~ameter of 0.079 inches, a wall thickness of 0.016 inches, pores 1 of maximum size 2.0 um, 50X poros~ty, and a~r permeab~l1ty through the wall of 0.005 cm/sec at 1.27 cm H20 P. Under d~fferent , conditions a tube is made of ~nside d~amenter 0.50 ~nches, a wall th~ckness of 0.039", a maximum pore s~ze of 3.5 um and a poros1ty of 70%.
In operation, once the tube ~s prepared, it ls sealed at one end by any suitable seallng means. For example, heat seal~ng can be carried out by using an adheslve such as polyethylene, or a melt-processlble tetrafluorethylene copolymer, and heating and compress~ng the end of the tube to result ln the conflgurat~on shown ~n the draw~ngs or simply fuston bond1ng the tube to ltself. An alternate method 1s to seal one end by means of a plug that ~s snuggly f~tted 1n the end.
The tube ~s then f111ed w1th an adsorbent part~culate, such as silica gel, act~vated carbon, calc1um sulfate, calc~um carbonate, activated alumina, molecular seives or the like. The rema~nlng ~ open end is then sealed in a manner 11ke the other end.
,1 In practice, an adsorbent-f~lled tubular conta~ner made of expanded porous polytetrafluoroethylene, about two ~nches long, 0.6 lnch diameter and 0.5 inch ~ns~de d~ameter fllled w1th 5 grams anhydrous,CaS04 (Calcium Sulfate) was used to adsorb water vapor ~i from the ~nter~or of a 9 l~ter sealed glass ~ar. The relat1ve -~ hum~d~ty 1ns~de the jar was reduced to 20X RH from an in~t~al 60X
~1 RH with the add1t1On of the adsorbent tube.
~ Pore s~ze is measured by m k roscopy.
-; Poros1ty (X vo1d space) ls measured by dens~ty (we~ght per ~ volume) measurements.
:, ~, .
,"~' .
This invention provides an adsorbent-containing device having such a protective covering. The device comprises a contatner for selectively adsorbing gaseous components present in an environment, which container comprises a tubular structure of expanded, porous polytetrafluoroethylene, said tubular structure being sealed at both ends, so as to encapsulate an adsorbent present within the tubular structure, the pores of said porous polytetrafluoroethylene having an average size of between about 0.1 and 1 micron, with substantially no pores greater than 5 micron in size.
..-DESCRIPTION OF THE DRAWINGS
F~gure 1 depicts an embodiment of the tubular container of the present invention, cut away to expose the interior of the tubular . container with adsorbent particles inside.
Figure 2 is a vlew of the tubular container cut along l~ne 2-2 of Figure 1, but without having any adsorbent particles inside.
DESCRIPTION OF THE INVENTION
~ ~ . .
~ : . .
;~ Refering to the Figures, the tubular container of the ; ~ invention compr~ses a tube 10 made of expanded porous polytetrafluoroethylene sealed at each end 11 so as to enclose adsorbent partkles 12.
The tube can be slightly to very flex~ble, depending on the strength of the polytetrafluoroethylene and the thickness of the walls. For most applications, the wall thlckness will be between 10 and 50 m~ls (250-1250 micron) on average. The expanded porous polytetrafluoroethylene tube is made accord1ng to the procedures descr1bed in U.S. Patents 4,110,392, 4,187,390, 4,075,679 and 3,953,566. More specifically, coagulated dispersion polytetrafluoroethylene (PTFE) is lightly lubricated and extruded as a paste through an annular-dle extruder. In a series of , ., : ~;;
~, ~ .
~328827 ~.
, heating and stretching steps the lubricant is evaporated away and the PTFE structure is expanded such that the percent void space or porosity is finally about 30-80%. The resulting tube is s~ntered by heating above the crystalline melt temperature of PTFE. Under ~i one set of condltions such a tube ~s made having an inside d~ameter of 0.079 inches, a wall thickness of 0.016 inches, pores 1 of maximum size 2.0 um, 50X poros~ty, and a~r permeab~l1ty through the wall of 0.005 cm/sec at 1.27 cm H20 P. Under d~fferent , conditions a tube is made of ~nside d~amenter 0.50 ~nches, a wall th~ckness of 0.039", a maximum pore s~ze of 3.5 um and a poros1ty of 70%.
In operation, once the tube ~s prepared, it ls sealed at one end by any suitable seallng means. For example, heat seal~ng can be carried out by using an adheslve such as polyethylene, or a melt-processlble tetrafluorethylene copolymer, and heating and compress~ng the end of the tube to result ln the conflgurat~on shown ~n the draw~ngs or simply fuston bond1ng the tube to ltself. An alternate method 1s to seal one end by means of a plug that ~s snuggly f~tted 1n the end.
The tube ~s then f111ed w1th an adsorbent part~culate, such as silica gel, act~vated carbon, calc1um sulfate, calc~um carbonate, activated alumina, molecular seives or the like. The rema~nlng ~ open end is then sealed in a manner 11ke the other end.
,1 In practice, an adsorbent-f~lled tubular conta~ner made of expanded porous polytetrafluoroethylene, about two ~nches long, 0.6 lnch diameter and 0.5 inch ~ns~de d~ameter fllled w1th 5 grams anhydrous,CaS04 (Calcium Sulfate) was used to adsorb water vapor ~i from the ~nter~or of a 9 l~ter sealed glass ~ar. The relat1ve -~ hum~d~ty 1ns~de the jar was reduced to 20X RH from an in~t~al 60X
~1 RH with the add1t1On of the adsorbent tube.
~ Pore s~ze is measured by m k roscopy.
-; Poros1ty (X vo1d space) ls measured by dens~ty (we~ght per ~ volume) measurements.
:, ~, .
,"~' .
Claims (11)
1. A container for selectively adsorbing components present in an environment, which comprises a tubular structure of expanded, porous polytetrafluoroethylene, said tubular structure being sealed at both ends so as to encapsulate an adsorbent present within the tubular structure, the pores of said polytetrafluoroethylene having an average size of between about 0.1 and 1 micron, with substantially no pores greater than 5 micron in size.
2. The container of claim 1 wherein the average wall thickness is between 10 and 50 mils.
3. The container of claim 2 wherein the length of the container is between 0.25 and 20 inches.
4. The container of claim 1 wherein the adsorbent is calcium sulfate.
5. The container of claim 1 wherein the adsorbent is activated carbon.
6. The container of claim 1 wherein the adsorbent is silica gel.
7. The container of claim 1 wherein the adsorbent is calcium carbonate.
8. The container of claim 1 wherein the adsorbent is activated alumina.
9. The container of claim 1 wherein the adsorbent is molecular sieves.
10. The container of claim 1 wherein the ends of the tube are sealed with an adhesive.
11. The contain of claim 1 wherein the adsorbent is sealed by fusion of PTFE to PTFE.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/218,779 US4830643A (en) | 1988-07-13 | 1988-07-13 | Expanded polytetrafluoroethylene tubular container |
US218,779 | 1988-07-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
CA1328827C true CA1328827C (en) | 1994-04-26 |
Family
ID=22816476
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA000605451A Expired - Lifetime CA1328827C (en) | 1988-07-13 | 1989-07-12 | Expanded polytetrafluoroethylene tubular container |
Country Status (6)
Country | Link |
---|---|
US (1) | US4830643A (en) |
EP (1) | EP0428558B1 (en) |
JP (1) | JPH07114911B2 (en) |
AU (1) | AU3970589A (en) |
CA (1) | CA1328827C (en) |
WO (1) | WO1990000438A1 (en) |
Families Citing this family (77)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5308665A (en) * | 1989-02-28 | 1994-05-03 | Baxter Diagnostics Inc. | Impurity scavenger pillow |
US5009308A (en) * | 1989-08-09 | 1991-04-23 | Multiform Desiccants, Inc. | Controlled rate adsorbent unit and method of fabrication thereof |
US5022902A (en) * | 1989-10-26 | 1991-06-11 | Stanhope Products Company | Adsorbent package that is resistant to high temperature |
US5593482A (en) * | 1990-03-20 | 1997-01-14 | W. L. Gore & Associates, Inc. | Adsorbent assembly for removing gaseous contaminants |
WO1991014496A1 (en) * | 1990-03-20 | 1991-10-03 | W.L. Gore & Associates, Inc. | An adsorbent assembly for removing gaseous contaminants |
US5016628A (en) * | 1990-04-23 | 1991-05-21 | Environmental Support Systems, Inc. | Disposable carbon dioxide absorber |
US5069694A (en) * | 1990-07-02 | 1991-12-03 | Multiform Desiccants, Inc. | Packet for compound treatment of gases |
DE69106374T2 (en) * | 1990-09-07 | 1995-07-13 | Gore & Ass | NATURAL GAS SAMPLING DEVICE. |
US5235863A (en) * | 1990-09-07 | 1993-08-17 | W. L. Gore & Associates, Inc. | Soil-gas sampling apparatus |
US5148337A (en) * | 1990-09-20 | 1992-09-15 | Multiform Desiccants, Inc. | Controlled rate adsorbent and disc drive stabilizing unit |
JP3141953B2 (en) * | 1991-07-04 | 2001-03-07 | ジャパンゴアテックス株式会社 | Clothing material |
US5271842A (en) * | 1991-12-10 | 1993-12-21 | Pall Corporation | Contaminant removal system and process |
US5174800A (en) * | 1991-12-11 | 1992-12-29 | Schwilling Stephen F | Activated carbon radon adsorption for buildings |
US5500038A (en) * | 1994-08-30 | 1996-03-19 | W. L. Gore & Associates, Inc. | Non-particulating compact adsorbent filter |
CA2171016A1 (en) * | 1994-09-01 | 1996-03-07 | Richard Narvaez | A sample container |
US6132492A (en) * | 1994-10-13 | 2000-10-17 | Advanced Technology Materials, Inc. | Sorbent-based gas storage and delivery system for dispensing of high-purity gas, and apparatus and process for manufacturing semiconductor devices, products and precursor structures utilizing same |
US5538545A (en) * | 1994-11-04 | 1996-07-23 | W. L. Gore & Associates | Nonparticulating adsorbent recirculating filter |
DE19517144C1 (en) * | 1995-05-10 | 1996-07-04 | Draegerwerk Ag | Filter for electrochemical measuring cell with porous housing |
WO1997000717A1 (en) * | 1995-06-20 | 1997-01-09 | Donaldson Company, Inc. | Filter and method for making a filter |
US5928414A (en) * | 1996-07-11 | 1999-07-27 | W. L. Gore & Associates, Inc. | Cleanable filter media and filter elements |
DE19645009A1 (en) * | 1996-10-31 | 1998-05-07 | Ultrafilter Gmbh | Container of a drying plant with adsorbent |
US6143058A (en) * | 1997-03-17 | 2000-11-07 | Donaldson Company, Inc. | Adsorbent construction and method |
US5876487A (en) * | 1997-03-17 | 1999-03-02 | Donaldson Company, Inc. | Adsorbent construction; and, method |
DE19753956A1 (en) * | 1997-12-05 | 1999-06-17 | Draeger Sicherheitstech Gmbh | Scent cartridge distributing aroma for commercial and entertainment applications |
US6660063B2 (en) | 1998-03-27 | 2003-12-09 | Advanced Technology Materials, Inc | Sorbent-based gas storage and delivery system |
US6406519B1 (en) * | 1998-03-27 | 2002-06-18 | Advanced Technology Materials, Inc. | Gas cabinet assembly comprising sorbent-based gas storage and delivery system |
US6168651B1 (en) | 1998-10-08 | 2001-01-02 | Donaldson Company, Inc. | Filter assembly with shaped adsorbent article; and devices and methods of use |
US6146446A (en) * | 1998-10-08 | 2000-11-14 | Donaldson Company, Inc. | Filter assembly with shaped adsorbent article; and devices and methods of use |
US6270609B1 (en) * | 1999-01-11 | 2001-08-07 | 3M Innovative Properties Company | Hard disk drive filter |
JP2000211073A (en) | 1999-01-22 | 2000-08-02 | Nitto Denko Corp | Laminate for adsorbent-including container and adsorbent-including container using the same |
US6356407B1 (en) * | 1999-03-31 | 2002-03-12 | Seagate Technology Llc | System and process for reducing contamination in internal disc drive environment |
JP2001002042A (en) * | 1999-06-17 | 2001-01-09 | Hitachi Chem Co Ltd | Container, and adsorption apparatus using the same |
US6214095B1 (en) | 1999-07-06 | 2001-04-10 | Donaldson Company, Inc. | Adsorbent pouch for removal of gaseous contaminants |
WO2001014041A2 (en) | 1999-08-23 | 2001-03-01 | Gore Enterprise Holdings, Inc. | Filter for removing contaminants from an enclosure |
US6296691B1 (en) | 1999-09-21 | 2001-10-02 | Gore Enterprise Holdings, Inc. | Multi-functional molded filter for removing contaminants from an enclosure |
US6238467B1 (en) | 1999-09-24 | 2001-05-29 | Gore Enterprise Holdings, Inc. | Rigid multi-functional filter assembly |
US6402811B1 (en) * | 1999-12-30 | 2002-06-11 | Anthony E. Shanks | Non-dusting sorbent material filter |
DE10014678C2 (en) * | 2000-03-17 | 2002-02-07 | Siemens Ag | filter bag |
TW587396B (en) * | 2000-03-31 | 2004-05-11 | Nitto Denko Corp | Gas component treated sheet and electroluminescent element containing the same |
DE10025694C2 (en) * | 2000-05-24 | 2003-06-05 | Zeiss Carl | Use of a diffraction grating |
ATE462491T1 (en) * | 2000-12-06 | 2010-04-15 | Uop Llc | ADSORPTIVE SHEET AND METHOD FOR PRODUCING SAME |
US6709493B2 (en) | 2001-03-26 | 2004-03-23 | Gore Enterprise Holdings, Inc. | Device for reducing the presence of moisture within an enclosure containing a heat source |
US6428612B1 (en) * | 2001-04-19 | 2002-08-06 | Hughes Electronics Corporation | Hydrogen getter package assembly |
DE60139961D1 (en) * | 2001-07-16 | 2009-10-29 | Nitto Denko Corp | ANDTEIL AND ELECTROLUMINESCENE ELEMENT USING THIS |
US7189579B2 (en) * | 2002-02-22 | 2007-03-13 | Gas Technology Institute | Zero headspace extractor and method for determining partitioning and contaminant release rates of volatile and semi-volatile compounds |
US7105037B2 (en) * | 2002-10-31 | 2006-09-12 | Advanced Technology Materials, Inc. | Semiconductor manufacturing facility utilizing exhaust recirculation |
US6991671B2 (en) | 2002-12-09 | 2006-01-31 | Advanced Technology Materials, Inc. | Rectangular parallelepiped fluid storage and dispensing vessel |
US7494530B2 (en) * | 2002-12-10 | 2009-02-24 | Advanced Technology Materials, Inc. | Gas storage and dispensing system with monolithic carbon adsorbent |
US8002880B2 (en) | 2002-12-10 | 2011-08-23 | Advanced Technology Materials, Inc. | Gas storage and dispensing system with monolithic carbon adsorbent |
US6743278B1 (en) | 2002-12-10 | 2004-06-01 | Advanced Technology Materials, Inc. | Gas storage and dispensing system with monolithic carbon adsorbent |
US6866702B2 (en) * | 2003-01-29 | 2005-03-15 | International Environmental Conservative Association, Inc. | Device for absorbing carbon dioxide, and a method for absorbing carbon dioxide |
US7867511B2 (en) | 2004-01-23 | 2011-01-11 | Travanti Pharma Inc. | Abuse potential reduction in abusable substance dosage form |
US7306659B2 (en) * | 2004-08-13 | 2007-12-11 | Gore Enterprise Holdings | Adsorbent breather filter |
US7291208B2 (en) * | 2004-08-13 | 2007-11-06 | Gore Enterprise Holdings, Inc. | Grooved active and passive adsorbent filters |
US7318859B2 (en) * | 2004-10-18 | 2008-01-15 | Gore Enterprise Holdings | Modular adsorbent filters |
US20060222791A1 (en) * | 2005-04-01 | 2006-10-05 | Tsang-Hung Hsu | Moisture-permeable dehumidifying capsule |
ITMI20060056A1 (en) * | 2006-01-16 | 2007-07-17 | Getters Spa | ELECTROLYTIC CONDENSER INCLUDING MEANS FOR THE ABSORPTION OF HARMFUL SUBSTANCES |
US20070194205A1 (en) * | 2006-02-06 | 2007-08-23 | Ronald Blackmon | Reusable isolation joint form |
EP2134395B1 (en) | 2007-03-30 | 2020-03-18 | Philip Morris Products S.A. | Device for delivery of a medicament |
ITMI20071147A1 (en) | 2007-06-05 | 2008-12-06 | Getters Spa | RECHARGEABLE LITHIUM BATTERIES INCLUDING VEHICLES FOR THE ABSORPTION OF HARMFUL SUBSTANCES |
ITMI20071148A1 (en) | 2007-06-05 | 2008-12-06 | Getters Spa | RECHARGEABLE LITHIUM BATTERIES INCLUDING MEDIA IN THE FORM OF A MULTILAYER POLYMERIC SHEET FOR THE ABSORPTION OF HARMFUL SUBSTANCES |
WO2010059268A1 (en) | 2008-11-19 | 2010-05-27 | Murray Kenneth D | Carbon dioxide control device to capture carbon dioxide from vehicle combustion waste |
AU2010226152B2 (en) | 2009-03-17 | 2014-09-25 | Philip Morris Products Sa | Tobacco-based nicotine aerosol generation system |
KR101753414B1 (en) * | 2009-03-24 | 2017-07-19 | 파나소닉 주식회사 | Fabrication method for gas-adsorbing device, gas-adsorbing device, and method of using the same |
JP5702389B2 (en) | 2009-09-16 | 2015-04-15 | フィリップ・モーリス・プロダクツ・ソシエテ・アノニム | Improved apparatus and method for delivering pharmaceuticals |
US20110149435A1 (en) * | 2009-12-18 | 2011-06-23 | Charles Brown | Absorbing contaminants by diffusion in a low density gas filled hard disk drive (hdd) |
US8679231B2 (en) | 2011-01-19 | 2014-03-25 | Advanced Technology Materials, Inc. | PVDF pyrolyzate adsorbent and gas storage and dispensing system utilizing same |
US9126139B2 (en) | 2012-05-29 | 2015-09-08 | Entegris, Inc. | Carbon adsorbent for hydrogen sulfide removal from gases containing same, and regeneration of adsorbent |
US10010822B2 (en) | 2012-08-10 | 2018-07-03 | Donaldson Company, Inc. | Recirculation filter for an electronic enclosure |
JP6209023B2 (en) * | 2013-08-28 | 2017-10-04 | 静岡県公立大学法人 | Collection device and collection method |
WO2015123406A1 (en) | 2014-02-13 | 2015-08-20 | Donaldson Company, Inc. | Recirculation filter for an enclosure |
US9683686B2 (en) * | 2014-12-15 | 2017-06-20 | American Air Filter Company, Inc. | Auto-draining filter apparatus |
SG10201908699SA (en) | 2015-03-23 | 2019-10-30 | Donaldson Co Inc | Pattern coated filter and method |
CN105344256A (en) * | 2015-11-16 | 2016-02-24 | 江苏泛亚微透科技股份有限公司 | Coated molecular sieve filtration gas-permeable membrane assembly for precision electronic protection and preparation method thereof |
CN111132747B (en) | 2017-07-06 | 2022-06-07 | W.L.戈尔及同仁股份有限公司 | Renewable desiccant member comprising a bentonite material and a polymer |
US11389844B2 (en) | 2018-03-20 | 2022-07-19 | Verde Environmental Technologies, Inc. | Blister pack disposal system |
JP7430539B2 (en) * | 2020-01-30 | 2024-02-13 | 愛三工業株式会社 | Gas adsorption device, method of manufacturing an adsorption unit, and method of manufacturing a gas adsorption device |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3911080A (en) * | 1971-09-10 | 1975-10-07 | Wright H Dudley | Air pollution control |
US3990872A (en) * | 1974-11-06 | 1976-11-09 | Multiform Desiccant Products, Inc. | Adsorbent package |
US4110392A (en) * | 1976-12-17 | 1978-08-29 | W. L. Gore & Associates, Inc. | Production of porous sintered PTFE products |
DE3004325A1 (en) * | 1979-02-08 | 1980-08-14 | Mitsubishi Gas Chemical Co | BAG CONTAINING OXYGEN ABSORPTION AGENTS AND CONTAINER LOCKED WITH IT |
US4332845A (en) * | 1979-12-21 | 1982-06-01 | Mitsubishi Gas Chemical Company, Inc. | Oxygen absorbent-containing bag |
US4383376A (en) * | 1981-03-18 | 1983-05-17 | Showa Denko Kabushiki Kaisha | Contact-dehydrating sheet for drying protein-containing food |
GB2126123B (en) * | 1982-09-04 | 1986-08-06 | John Charles Cornforth | Adsorbent element |
AT381463B (en) * | 1984-03-09 | 1986-10-27 | Sleytr Uwe B | DEFINED POROUS MEMBRANE, METHOD FOR THE PRODUCTION AND USE THEREOF |
US4772300A (en) * | 1985-04-04 | 1988-09-20 | Multiform Desiccants, Inc. | Adsorbent cartridge |
JPS627415A (en) * | 1985-07-04 | 1987-01-14 | Keinosuke Isono | Container of adsorbent and moisture absorbing device and deodorizing device using the same |
-
1988
- 1988-07-13 US US07/218,779 patent/US4830643A/en not_active Expired - Lifetime
-
1989
- 1989-07-12 CA CA000605451A patent/CA1328827C/en not_active Expired - Lifetime
- 1989-07-13 AU AU39705/89A patent/AU3970589A/en not_active Abandoned
- 1989-07-13 WO PCT/US1989/003028 patent/WO1990000438A1/en active IP Right Grant
- 1989-07-13 EP EP89908580A patent/EP0428558B1/en not_active Expired - Lifetime
- 1989-07-13 JP JP1508081A patent/JPH07114911B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH07114911B2 (en) | 1995-12-13 |
EP0428558B1 (en) | 1993-01-07 |
WO1990000438A1 (en) | 1990-01-25 |
EP0428558A1 (en) | 1991-05-29 |
US4830643A (en) | 1989-05-16 |
AU3970589A (en) | 1990-02-05 |
JPH04501229A (en) | 1992-03-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA1328827C (en) | Expanded polytetrafluoroethylene tubular container | |
US6890373B2 (en) | Adsorbents, process for producing the same, and applications thereof | |
CN1079273C (en) | Filter and method for making filter | |
US5876487A (en) | Adsorbent construction; and, method | |
RU2483243C2 (en) | Lamp assembly | |
US6143058A (en) | Adsorbent construction and method | |
JP5038153B2 (en) | Improved ventilation system for minimizing condensation inside the lighting assembly | |
KR101137461B1 (en) | Pyrolyzed monolith carbon physical adsorbent | |
CA2167407C (en) | An improved non-particulating compact adsorbent filter | |
CA1313174C (en) | Selectively permeable zeolite adsorbents and sealants made therefrom | |
CN111132747B (en) | Renewable desiccant member comprising a bentonite material and a polymer | |
WO1998019790A1 (en) | Desiccation using polymer-bound desiccant beads | |
US6000198A (en) | Method and package for packaging contents at reduced pressures | |
KR20210096665A (en) | Sintered compact for adsorption, manufacturing method thereof, and adsorption device | |
JPS6343669B2 (en) | ||
WO2000041795A1 (en) | Sorbent filter for hard disk drives | |
EP2864023A1 (en) | Absorbent for optics and electrical components | |
JPH0199631A (en) | Dehumidifier | |
WO1997037756A1 (en) | An improved clean, stiff, washable, compact adsorbent filter assembly | |
JP2002361027A (en) | Dehumidifying material for gas within paired glass | |
WO1993001101A1 (en) | Control of condensation | |
MXPA00006941A (en) | Self-evacuating vacuum insulation panels | |
WO1997021781A9 (en) | Desiccant compositions for removing moisture from fluids | |
WO1997021781A1 (en) | Desiccant compositions for removing moisture from fluids |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
MKEX | Expiry |
Effective date: 20110426 |