摘要:
A method of making a fluorinated fibrous web, which method includes providing a nonwoven web 22 that contains polymeric fibers, creating a plasma that contains fluorine atoms at a first location 14, and contacting the nonwoven web with products from the plasma at a second location 26 remote from the first location 14. The method avoids exposure of the web to the plasma and hence expands the manufacturing processing window. Webs so fluorinated have a different C3F4H+ to C2F5+ ratio when compared to locally fluorinated webs having similar levels of surface fluorination. The remote fluorinated webs can be subsequently charged electrically to provide a good performing electret filter 40 suitable for use in an air purifying respirator 30. Webs fluorinated in accordance with this invention also may exhibit good performance even after being “aged” at high temperatures.
摘要:
A discharge electrode using carbon fibers, nanofibers and/or nanotubes to generate the corona discharge. The invention contemplates carbon fiber electrodes with or without a polymer matrix to form a composite, and a supporting configuration in which the fibers are wrapped helically around a supporting rod that extends along the length of the electrode. Another supporting configuration includes the fibers stretched across the gas flow path. Yet another supporting configuration includes mounting the fibers along the length of the support rod substantially parallel to the rod.
摘要:
A method of making a fluorinated fibrous web, which method includes providing a nonwoven web (22) that contains polymeric fibers, creating a plasma that contains fluorine atoms at a first location (14), and contacting the nonwoven web with products from the plasma at a second location (26) remote from the first location (14). The method avoids exposure of the web to the plasma and hence expands the manufacturing processing window. Webs so fluorinated have a different C 3 F 4 H + to C 2 F 5 + ratio when compared to locally fluorinated webs having similar levels of surface fluorination. The remote fluorinated webs can be subsequently charged electrically to provide a good performing electret filter (40) suitable for use in an air purifying respirator (30). Webs fluorinated in accordance with this invention also may exhibit good performance even after being "aged" at high temperatures.
摘要:
The invention is a device for filtering the air in the atmosphere and abating polluting substances like fine particulates, comprising one or more means (C, D) for filtering an air flow (Wi), at least one intake (A) for sucking the air (Wi) conveyed to said filtering means (C, D) and at least one outlet (F) for the filtered air (Wu), a frame or body (U) suited to contain said filtering means (C, D) and to be installed on the roof of transport vehicles (1) like buses, streetcars or other means of transport.
摘要:
Eine Verwendung eines Filterelements in einer ozonhaltigen Atmosphäre mit einer Ozonkonzentration von mindestens 1 ppm, welches ein Fasern aufweisendes Filtermedium umfasst, wobei die Fasern aus Polyester und/ oder Polycarbonat bestehen, löst die Aufgabe, ein Filterelement anzugeben, welches in einer ozonhaltigen Atmosphäre eine dauerhafte Betriebstauglichkeit zeigt.
摘要:
The invention is a discharge electrode (20, 22, 24) in an electrostatic precipitator having a power supply (30) connected to at least one collection electrode (12, 14, 16) and a flow of gas across the collection electrode (12, 14, 16). The discharge electrode (20, 22, 24) has a plurality of conductive fibers electrically connected to the power supply (30) and fiber tips exposed to the flow of gas. The fiber tips preferably extend from a composite in which the fibers reinforce a matrix material, but alternatively can be a large number of filaments (72) extending from a composite rod (70).
摘要:
Disclosed is an air purifier with a small size, having an excellent air purifying capacity, enabling to prevent a large amount of ozone from being generated, the ozone harmful to a human body. The air purifier includes a case, a pair of discharge electrodes provided at upper and lower parts of the case, a ground electrode provided between the pair of discharge electrodes, a pair of insulating dielectric layers provided on upper and lower surfaces of the ground electrode, and a power source coupled respectively to the ground electrode and the discharge electrode so as to supply voltage thereto.
摘要:
An air filter includes a stack (FB) of filter discs (10, 20) formed with contacting faces having surface formations defining filtering passageways between adjacent discs (10, 20) for removing solid particles from the air passing through the stack (FB). The filter discs (10, 20) in the stack (FB) further include electrodes (20) spaced from each other axially of the stack (FB) and connectable to a voltage source (30) for producing an electrical field attracting solid particles towards the discs (10, 20) to thereby enhance removal of the solid particles from the air passing through the stack (FB). The filter discs (10, 20) in the stack (FB) include a first plurality of insulating discs (10) composed of insulating material, and a second plurality of electrode discs (20) composed of electrically-conductive material, with the electrode discs (20) separated from each other by at least one insulating disc (10).
摘要:
Dispositif de séparation électrostatique à deux niveaux se présentant sous la forme d'une cartouche filtrante électrostatique (6) incorporant un agent de neutralisation et pouvant être logée dans un boîtier (1) tubulaire ou rectangulaire. Le dispositif est formé d'électrodes en forme de lamelles (7) auxquelles on applique des potentiels différents et qui sont séparées par des films isolants (8). L'ionisation des particules à séparer s'effectue via une source d'UV et/ou dans l'espace entre une électrode de grille (4) mise à la terre et le bord de l'électrode en lamelles (7), à laquelle on applique une forte tension, une densité ionique élevée étant créée dans ledit espace. Les particules ionisées sont séparées dans la cartouche filtrante (6) électrostatique formant le collecteur. Au niveau de la sortie du gaz de la cartouche filtrante (6) électrostatique, une décharge par effet de couronne présentant les deux polarités ioniques se produit entre les électrodes mises à la terre et les électrodes en lamelles (7) qui sont soumises à une tension élevée (9), ce qui permet d'assurer le fonctionnement d'une zone de neutralisation (17) pour le courant de gaz filtré.