Combined vapour and particulate filter

With reference to FIGS. (1 and 2), a personal respirator (1) has a face mask (2) and is provided with a filter unit (3) comprising a canister (4) housing contiguous layers (5) of novel filter material (6). The filter material (6) is suitable for both particulate and vapour filtration, and comprises...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	CHINN MATTHEW JOSEPH, PEARS LAURENCE ANTHONY
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING ORPROTECTING AGAINST HARMFUL CHEMICAL AGENTS CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY FIRE-FIGHTING HUMAN NECESSITIES LIFE-SAVING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	With reference to FIGS. (1 and 2), a personal respirator (1) has a face mask (2) and is provided with a filter unit (3) comprising a canister (4) housing contiguous layers (5) of novel filter material (6). The filter material (6) is suitable for both particulate and vapour filtration, and comprises a composite of first and second groups (10, 11) of chopped fibres, the fibres of the first group (10) having a relatively large diameter (about 7x10-6m) and the second group (11) having a relatively small diameter (about 0.5x10-6m).