DE4205648A1 - Flat filter for protection against toxic skin-permeable chemicals - comprising air-permeable carrier coated with non-carbonised polymeric absorber particles applied with adhesive in point pattern - Google Patents

Flat filter for protection against toxic skin-permeable chemicals - comprising air-permeable carrier coated with non-carbonised polymeric absorber particles applied with adhesive in point pattern

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Publication number
DE4205648A1
DE4205648A1 DE19924205648 DE4205648A DE4205648A1 DE 4205648 A1 DE4205648 A1 DE 4205648A1 DE 19924205648 DE19924205648 DE 19924205648 DE 4205648 A DE4205648 A DE 4205648A DE 4205648 A1 DE4205648 A1 DE 4205648A1
Authority
DE
Germany
Prior art keywords
permeable
air
adhesive
protection against
skin
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.)
Withdrawn
Application number
DE19924205648
Other languages
German (de)
Inventor
Hasso Von Bluecher
Ernest De Dr Ruiter
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE19924205648 priority Critical patent/DE4205648A1/en
Priority to DE4243232A priority patent/DE4243232A1/en
Priority to US08/021,429 priority patent/US5277963A/en
Publication of DE4205648A1 publication Critical patent/DE4205648A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28028—Particles immobilised within fibres or filaments
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B23/00—Filters for breathing-protection purposes
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
    • A62D5/00—Composition of materials for coverings or clothing affording protection against harmful chemical agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/08—Filter cloth, i.e. woven, knitted or interlaced material
    • B01D39/083—Filter cloth, i.e. woven, knitted or interlaced material of organic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
    • B01J20/28004—Sorbent size or size distribution, e.g. particle size
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28016—Particle form
    • B01J20/28019—Spherical, ellipsoidal or cylindrical
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28026—Particles within, immobilised, dispersed, entrapped in or on a matrix, e.g. a resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28033—Membrane, sheet, cloth, pad, lamellar or mat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B01D2239/0407—Additives and treatments of the filtering material comprising particulate additives, e.g. adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B01D2239/0471—Surface coating material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/065—More than one layer present in the filtering material
    • B01D2239/0654—Support layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/12—Special parameters characterising the filtering material
    • B01D2239/1241—Particle diameter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/12—Special parameters characterising the filtering material
    • B01D2239/1291—Other parameters

Abstract

Filter (I) consists of an air-permeable carrier on which is applied spherical, noncarbonised polymeric absorber by means of an adhesive compsn. (II) printed on in a point pattern as small mounds. Also claimed are protective suits comprising (I) as filter layer. Carrier is flat woven, knitted, or nonwoven textile article of natural or synthetic fibres. Globular absorber has dia. 0.2-1, pref. 0.5-0.6, mm, is prepd. by emulsion or dispersion polymerisation, and is gel-type, esp. from styrene and divinylbenzene. (II) consists, at least partially, of masked prepolymeric di- or poly-isocyanate crosslinked with a di- or poly-amine. USE/ADVANTAGE - Protection against skin-permeable toxic chemicals in civilian and military applications. Compared with active C, (I) shows good compromise between absorption and desorption (decontamination) characteristics for skin-permeable chemical warfare agents, desorbing more readily

Description

Sowohl im militärischen als auch im zivilen Bereich besteht die Notwendigkeit eines persönlichen Schutzes gegen chemische Gifte. Während der Schutz der Atemwege und der Augen schon früh durch die Gasmaske realisiert wurde, bedurfte es einer längeren Entwicklung, um zu einem brauchbaren Schutz für die Haut gegen hautgängige Gifte zu kommen. Natürlich ist es nicht schwierig, den Träger mit Hilfe eines Schutzanzuges aus besonders gummiertem oder beschichtetem Material zu schützen; aber solche Schutzanzüge sind luft- und feuchtigkeitsundurchlässig und führen unweigerlich zu einem Hitzestau, so daß sie nur für kurze Einsätze geeignet sind. Das gleiche gilt für Anzüge aus Schichtmaterialien, die luft- und wasserdampfundurchlässige Folie beinhalten. Es dauerte bis in die siebziger Jahre, bevor luft- und wasserdampfundurchlässige Schutzanzüge zur Verfügung standen. Diese Anzüge haben alle eine flüssigkeitsabweisende Außenschicht und dahinter eine Adsorptionsschicht für die Dämpfe. Grundsätzlich besteht die Adsorptionsschicht aus Aktivkohle, wobei mehrere Ausführungsarten vorliegen. So wird beispielsweise eine wässerige Dispersion eines Binders (Latex) und einer feinvermahlenen Aktivkohle auf ein Vlies gesprüht bzw. auf einen textilen Träger gedruckt, oder es wird damit ein retikulierter PUR-Schaum imprägniert. Mit diesen Verfahren lassen sich ca. 40-80 g Aktivkohle pro m aufbringen. Die zufolge des Binders reduzierte Adsorp­ tionskinetik, aber auch die beschränkte Kapazität und die doch recht ungünstigen Trageeigenschaften, insbesondere die des imprägnierten Schaumes, führten dazu, daß intensiv nach besseren Lösungen gesucht wurde. Die bekannteste und weltweit eingeführte bzw. sich in Beschaffung befindende Lösung ist unter dem Namen SARATOGA bekannt. Das Grundprinzip ist, daß auf einem luftdurchlässigen Träger Aktivkohlekügelchen mit Hilfe eines speziellen Klebers zum Haften gebracht werden. Die hohe mögliche Auflage - bis über 200 g Aktivkohle pro m2 -, die einen optimalen Schutz garantiert und die guten Trageeigenschaften (geringe physiologische Belastung), aber auch seine Waschbarkeit, haben dazu geführt, daß SARATOGA heute als das beste zur Verfügung stehende Schutzmaterial angesehen wird. Alle genannten Systeme basieren auf dem Prinzip der Adsorption und verwenden Aktivkohle. Dabei kann die Aktivkohle sehr verschiedenen Ursprungs sein. Steinkohle, Torf, Holz, Pech aber auch Polymere, können zur Herstellung von Aktivkohle herangezogen werden, wobei für Kugelkohle nur Pech und karbonisierte poröse Polymere in Frage kommen. In allen Fällen bilden sich schlitzartige "Poren" aus, deren "innere Oberfläche" durch polykondensierte, großflächige Aromatsysteme gebildet werden, an welche sich die zu adsorbierenden Stoffe anlagern. Die Adsorption ist in erster Linie die Folge von Wechselwirkungen zwischen den Elektronen der Porenwand und jenen des Adsorbats (van der Waal′sche Kräfte), wobei die Adsorption in engeren Poren (Einfluß zweier Wände) immer stärker ist, so daß in diesem Fall die Desorption wenig flüchtiger Stoffe äußerst schwierig ist. Bisher wurde die Verwendung von Aktivkohle in permeablen Schutzanzügen für unumgänglich gehalten.Both in the military and in the civilian sector, there is a need for personal protection against chemical poisons. While the gas mask provided early protection of the respiratory tract and eyes, it took a long time to develop useful protection for the skin against skin-borne toxins. Of course, it is not difficult to protect the wearer with the help of a suit made of specially rubberized or coated material; but such protective suits are impermeable to air and moisture and inevitably lead to a build-up of heat, so that they are only suitable for short operations. The same applies to suits made of layered materials that contain air and water vapor impermeable film. It was not until the 1970s that protective suits that were impermeable to air and water vapor were available. These suits all have a liquid-repellent outer layer and an adsorption layer behind them for the vapors. Basically, the adsorption layer consists of activated carbon, and there are several types. For example, an aqueous dispersion of a binder (latex) and a finely ground activated carbon is sprayed onto a fleece or printed onto a textile backing, or it is used to impregnate a reticulated PUR foam. With this procedure approx. 40-80 g activated carbon can be applied per m. The reduced adsorption kinetics due to the binder, but also the limited capacity and the rather unfavorable wearing properties, especially that of the impregnated foam, led to intensive searches for better solutions. The best-known solution, which has been introduced worldwide or is currently in procurement, is known as SARATOGA. The basic principle is that activated carbon beads are adhered to an air-permeable carrier with the help of a special adhesive. The high possible circulation - up to more than 200 g activated carbon per m 2 - which guarantees optimal protection and the good wearing properties (low physiological load), but also its washability, have led to SARATOGA being regarded as the best available protective material today becomes. All the systems mentioned are based on the principle of adsorption and use activated carbon. The activated carbon can be of very different origins. Hard coal, peat, wood, pitch and also polymers can be used for the production of activated carbon, whereby only pitch and carbonized porous polymers can be used for spherical coal. In all cases, slit-like "pores" are formed, the "inner surface" of which is formed by polycondensed, large-area aromatic systems to which the substances to be adsorbed attach. The adsorption is primarily the result of interactions between the electrons of the pore wall and those of the adsorbate (van der Waal forces), whereby the adsorption in narrower pores (influence of two walls) is always stronger, so that in this case the desorption less volatile substances is extremely difficult. So far, the use of activated carbon in permeable protective suits has been considered essential.

Es wurde nun überraschenderweise ein Material gefunden, daß anstelle von Aktivkohle eingesetzt werden kann: Kügelchen, die durch Emulsions- bzw. Suspensionspolymerisation von Divinylbenzol und Styrol gewonnen werden. Jedes der meist 0,3-0,6 mm großen Kügelchen ist ein Agglomerat unzähliger kleiner Kügelchen. Zwischen diesen befinden sich dem Transport dienende Hohlräume, während die eigentliche Absorption durch einen Lösungsvorgang in dem polymeren Material unter leichter Quellung stattfindet.Surprisingly, a material has now been found that instead of Activated charcoal can be used: beads that are formed by emulsion or Suspension polymerization of divinylbenzene and styrene can be obtained. Each of the usually 0.3-0.6 mm large spheres is an agglomerate countless little balls. Between these are the transport serving Cavities while the actual absorption by a dissolving process in the polymeric material takes place with slight swelling.

Diese Absorbertype wird manchmal mit "Gel-Type" bezeichnet und hat keine echte Porenstruktur, wie sie in "porösen" Polymeren anzutreffen ist. Die Polymerketten sind so vernetzt, daß sie sich zwar noch etwas entfalten können, aber trotzdem eine zusammenhängende, dreidimensionale Struktur haben, in die sich andere Moleküle einlagern können. Es besteht eine gewisse Ähnlichkeit mit einem Gel, wo in einem dreidimensionalen Gerüst Moleküle eingelagert sind. Allerdings ist der Vernetzungsgrad dieser Absorber so hoch, daß eine hohe Festigkeit resultiert und die Aufnahmefähigkeit begrenzt ist. Kleinporige Aktivkohle besitzt für wenig flüchtige Produkte - dazu gehören hautgängige chemische Gifte und Kampfstoffe - ein sehr ausgeprägtes Rückhaltevermögen, was natürlich die Desorption (Dekontamination) erschwert. Das ist ein Vorteil, solange die Möglichkeit der Dekontamination nicht eine vordergründliche Forderung ist. Großporige Aktivkohle läßt sich besser desorbieren, kann aber unter ungünstigen Bedingungen (heißes Klima) adsorbierte Gifte in nicht mehr unbedenklichen Mengen wieder abgeben. This type of absorber is sometimes called "gel type" and has no real one Pore structure as found in "porous" polymers. The polymer chains are so networked that they can still develop a little, but still have a coherent, three-dimensional structure, into which others fit Can store molecules. There is some resemblance to a gel where Molecules are embedded in a three-dimensional framework. However, the Degree of crosslinking of these absorbers so high that high strength results and absorption capacity is limited. Small-pore activated carbon has little for volatile products - these include skin-friendly chemical poisons and warfare agents - a very pronounced retention, which of course the desorption (Decontamination) difficult. That is an advantage as long as the possibility of Decontamination is not a primary requirement. Large-pore activated carbon is easier to desorb, but can be used under unfavorable conditions (hot Climate) release adsorbed poisons in quantities that are no longer safe.  

Bei den beschriebenen Absorbern ist das Rückhaltevermögen für viele Substanzen, worunter die hautgängigen chemischen Kampfstoffe, so bemessen, daß ein guter Kompromiß zwischen Absorptions- und Desorptionseigenschaften vorliegt.With the absorbers described, the retention capacity is for many Substances, including the skin-penetrating chemical warfare agents, that a good compromise between absorption and desorption properties is present.

Da das Absorptionsmittel nur in Kügelchen von ca. 0,2 bis 1 ,0 mm hergestellt werden kann, kommt bei einer Verwendung für Schutzstoffe nur die SARATOGA- Technik in Frage.Since the absorbent is only made in beads of approx. 0.2 to 1.0 mm can only be used when using protective substances only SARATOGA Technology in question.

Bei der SARATOGA-Technik hat sich das "High Solid" -System der BAYER AG besonders bewährt. Es handelt sich dabei um eine Mischung eines durch ein Oxim blockiertes, präpolymeres Polyisocyanat und eines Bi- bzw. Polyamins, welches nach thermischer Abspaltung der maskierenden Komponente das Isocyanat vernetzt. Das kurz vor der Vernetzung auftretende Viskositätsminimum trägt zur guten Haftung der Adsorber auf dem Träger wesentlich bei. Es hat sich herausgestellt, daß das "High Solid"-System auch für die polymeren Absorber der Erfindung bestens geeignet ist. Es hat sich weiter gezeigt, daß das "High Solid"- System mit anderen Latices, insbesondere Polyurethan-Dispersionen, verschnitten werden kann, wobei die gute Haftung erhalten bleibt.The "High Solid" system from BAYER AG has been used for SARATOGA technology especially proven. It is a mixture of one by an oxime blocked, prepolymeric polyisocyanate and a bi- or polyamine, which after thermal cleavage of the masking component, the isocyanate networked. The viscosity minimum occurring shortly before crosslinking contributes good adhesion of the adsorber to the carrier. It has emphasized that the "High Solid" system also for the polymeric absorbers Invention is best suited. It has also been shown that the "High Solid" - System with other latices, especially polyurethane dispersions, blended can be retained, while maintaining good adhesion.

Beispiel 1example 1

Auf ein Gewebe mit Flächengewicht von 100 g/m2 und einer Luftdurchlässigkeit von 500 l/sec. m2 bei 10 mm WS wurde mit Hilfe einer 25 mesh- Rotationsdruckschablone (Durchlaß 42%) eine Klebermasse, bestehend aus 100 Teilen Impranil HS 62 und 6,2 Teilen Imprafix HSC, in Form kleiner Häufchen aufgedruckt. Auflage ca. 50 g/m2. Anschließend wurde die Warenbahn mit 0,4-0,6 mm großen Kügelchen des Absorberharzes Sorbathene bestreut, der Überschuß abgesaugt und der Kleber auskondensiert (Schutzmaterial A).On a fabric with a basis weight of 100 g / m 2 and an air permeability of 500 l / sec. m 2 at 10 mm WS, an adhesive mass consisting of 100 parts Impranil HS 62 and 6.2 parts Imprafix HSC was printed in the form of small piles using a 25 mesh rotary printing stencil (42% aperture). Print run approx. 50 g / m 2 . Then the web was sprinkled with 0.4-0.6 mm beads of the sorbathene absorber resin, the excess was suctioned off and the adhesive was condensed out (protective material A).

Beispiel 2Example 2

Der Versuch 1 wurde wiederholt, jedoch wurde die Klebermasse mit einer gleichen Menge Impranil HS-DW verschnitten, und es wurden noch 15% Wasser hinzugefügt (Schutzmaterial B).Experiment 1 was repeated, but the adhesive mass was the same The amount of Impranil HS-DW was blended and 15% water was left added (protective material B).

Die Absorbermenge (Harz) betrug sowohl für A als auch für B 135-140 m2. The amount of absorber (resin) was 135-140 m 2 for both A and B.

Beispiel 3Example 3

Für Vergleichszwecke wurden in gleicher Weise die Materialien C und D hergestellt, die aber mit aus Pech hergestellten Aktivkohlekügelchen beladen wurden: Auflage ca. 180 g/m2.For comparison purposes, the materials C and D were produced in the same way, but were loaded with activated carbon beads made of pitch: edition approx. 180 g / m 2 .

TestergebnisseTest results

  • a) Nato Substrattest (DB3 Methode)
    Hier darf der Durchtritt von Schwefellost bei einer Beaufschlagung von 10 g/m2 nach 6 Stunden 4 µg/cm2 nicht überschreiten. Für alle Muster (A, B, C und D) wurden weniger als 0,025 µg gemessen.    a) Nato substrate test (DB3 method)
    Here, the passage of sulfur ointment after an exposure to 10 g / m 2 after 6 hours must not exceed 4 µg / cm 2 . Less than 0.025 µg was measured for all samples (A, B, C and D).
  • b) Gasfest (TNO)
    Bei diesem Test wird der 1 ,5 cm2 große Prüfling mit Lost enthaltender Luft bei einer Geschwindigkeit von 1,1 cm/s durchströmt, wobei das Lostangebot 120 µg/h beträgt. Man mißt zuerst nach 30 min. und anschließend nach jeweils einer Stunde die durchgetretene Lostmenge. In allen Fällen (Muster A, B, C und D) betrug diese nach 30 min. 0,5-0,9 µg, anschließend 4-5 µg pro Stunde. Stellen, die mit bloßem Auge als nicht homogen erkannt wurden, wurden nicht berücksichtigt.    b) Gasproof (TNO)
    In this test, the 1.5 cm 2 specimen with air containing mustard is flowed through at a speed of 1.1 cm / s, the amount of lost material being 120 µg / h. First measure after 30 min. and then after every hour the amount of raffle that has passed through. In all cases (samples A, B, C and D) this was after 30 minutes. 0.5-0.9 µg, then 4-5 µg per hour. Locations that were not recognized as homogeneous with the naked eye were not taken into account.

Claims (5)

1. Flächenfilter, bestehend aus einem luftdurchlässigen Träger, auf welchem mittels einer punktförmig als Häufchen aufgedruckten Klebermasse kugelför­ mige, nicht karbonisierte polymere Absorber angebracht sind.1. surface filter, consisting of an air-permeable carrier, on which spherical by means of an adhesive mass printed as dots moderate, non-carbonized polymeric absorbers are attached. 2. Flächenfilter nach Anspruch 1, dadurch gekennzeichnet, daß der Träger ein textiles Flächengebilde - Gewebe, Gewirk oder Vlies - aus Natur- , Synthese- oder Naturfasern ist.2. Area filter according to claim 1, characterized in that the carrier textile fabric - woven, knitted or non-woven - made of natural, synthetic or natural fibers. 3. Flächenfilter nach Anspruch 1 und/oder 2, dadurch gekennzeichnet, daß die Klebermasse wenigstens teilweise aus einem maskierten, präpolymeren Di- bzw. Polyisocyanat, welches mit einem Di- bzw. Polyamin vernetzt wird, be­ steht.3. Area filter according to claim 1 and / or 2, characterized in that the Adhesive at least partially made of a masked, prepolymeric or polyisocyanate, which is crosslinked with a diamine or polyamine, be stands. 4. Flächenfilter nach einem oder mehreren der vorhergehenden Ansprüche, da­ durch gekennzeichnet, daß die kugelförmigen Absorber einen Durchmesser von 0,2 bis 1 mm, vorzugsweise um 0,5-0,6 mm haben, durch Emulsions- bzw. Dispersionspolymerisation hergestellt sind und zu den sogenannten, insbesondere aus Styrol und Divinylbenzol aufgebauten Geltypen gehören.4. area filter according to one or more of the preceding claims, because characterized in that the spherical absorber has a diameter from 0.2 to 1 mm, preferably around 0.5-0.6 mm, by emulsion or dispersion polymerization are produced and to the so-called, in particular include gel types composed of styrene and divinylbenzene. 5. Schutzanzug, welcher eine Filterschicht nach einem oder mehreren der vor­ hergehenden Ansprüchen beinhaltet.5. Protective suit, which is a filter layer after one or more of the before including claims.
DE19924205648 1992-02-25 1992-02-25 Flat filter for protection against toxic skin-permeable chemicals - comprising air-permeable carrier coated with non-carbonised polymeric absorber particles applied with adhesive in point pattern Withdrawn DE4205648A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE19924205648 DE4205648A1 (en) 1992-02-25 1992-02-25 Flat filter for protection against toxic skin-permeable chemicals - comprising air-permeable carrier coated with non-carbonised polymeric absorber particles applied with adhesive in point pattern
DE4243232A DE4243232A1 (en) 1992-02-25 1992-12-19 Protective material
US08/021,429 US5277963A (en) 1992-02-25 1993-02-23 Filter sheet material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19924205648 DE4205648A1 (en) 1992-02-25 1992-02-25 Flat filter for protection against toxic skin-permeable chemicals - comprising air-permeable carrier coated with non-carbonised polymeric absorber particles applied with adhesive in point pattern

Publications (1)

Publication Number Publication Date
DE4205648A1 true DE4205648A1 (en) 1993-08-26

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DE19924205648 Withdrawn DE4205648A1 (en) 1992-02-25 1992-02-25 Flat filter for protection against toxic skin-permeable chemicals - comprising air-permeable carrier coated with non-carbonised polymeric absorber particles applied with adhesive in point pattern

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Cited By (5)

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Publication number Priority date Publication date Assignee Title
DE4331587A1 (en) * 1993-09-17 1995-03-23 Hasso Von Bluecher Filter for rotary adsorbers
DE19516746A1 (en) * 1995-05-06 1996-11-07 Bluecher Hasso Von Easily-made flat filter with granular adsorbent for military gas mask
DE19617754A1 (en) * 1996-05-03 1997-11-06 Bluecher Gmbh Air cleaning filter for removing pollutants and odours from air
DE19634114A1 (en) * 1996-08-23 1998-02-26 Bluecher Gmbh Clean room clothing preventing emission of harmful gas and particles from body of wearer
EP1764136A1 (en) * 2005-09-16 2007-03-21 Blücher GmbH functional textile fabric provided with active microcapsules and its use

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US4460641A (en) * 1983-03-21 1984-07-17 Celanese Corporation Microporous hollow fibers as protectants against toxic agents
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DE2422574C2 (en) * 1974-05-09 1987-06-04 Collo Gmbh, 5303 Bornheim, De
DE3904623A1 (en) * 1989-02-16 1990-08-23 Sandler Helmut Helsa Werke Filter in particular for a vehicle
DE3211322C2 (en) * 1982-03-27 1990-11-22 Hubert Von Bluecher
DE3924033A1 (en) * 1989-07-21 1991-02-28 Ruiter Ernest De Chemical warfare agent resistant liner - which is separately worn below outer combat garments
DE3304349C2 (en) * 1983-02-09 1991-12-05 Hubert Von Bluecher
DE4020427A1 (en) * 1990-06-27 1992-01-02 Hasso Von Bluecher Adsorbent impregnated fabric filter - with low flow resistance, suitable for compact air conditioner units

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DE7042063U (en) * 1971-05-19 Bundesrepublik Deutschland NBC protection device
DE2429236C2 (en) * 1973-06-20 1985-04-25 The Dow Chemical Co., Midland, Mich. A composition of a carboxylic polyelectrolyte suitable for the manufacture of water-swellable objects and a process for the manufacture of water-swellable objects therefrom
DE2422574C2 (en) * 1974-05-09 1987-06-04 Collo Gmbh, 5303 Bornheim, De
US4392908A (en) * 1980-01-25 1983-07-12 Lever Brothers Company Process for making absorbent articles
DE3211322C2 (en) * 1982-03-27 1990-11-22 Hubert Von Bluecher
DE3304349C2 (en) * 1983-02-09 1991-12-05 Hubert Von Bluecher
US4460641A (en) * 1983-03-21 1984-07-17 Celanese Corporation Microporous hollow fibers as protectants against toxic agents
SU1313445A1 (en) * 1985-06-11 1987-05-30 Всесоюзный научно-исследовательский институт техники безопасности в химической промышленности Material of for protecting against heat action
DE3904623A1 (en) * 1989-02-16 1990-08-23 Sandler Helmut Helsa Werke Filter in particular for a vehicle
DE3924033A1 (en) * 1989-07-21 1991-02-28 Ruiter Ernest De Chemical warfare agent resistant liner - which is separately worn below outer combat garments
DE4020427A1 (en) * 1990-06-27 1992-01-02 Hasso Von Bluecher Adsorbent impregnated fabric filter - with low flow resistance, suitable for compact air conditioner units

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4331587A1 (en) * 1993-09-17 1995-03-23 Hasso Von Bluecher Filter for rotary adsorbers
DE19516746A1 (en) * 1995-05-06 1996-11-07 Bluecher Hasso Von Easily-made flat filter with granular adsorbent for military gas mask
DE19617754A1 (en) * 1996-05-03 1997-11-06 Bluecher Gmbh Air cleaning filter for removing pollutants and odours from air
DE19634114A1 (en) * 1996-08-23 1998-02-26 Bluecher Gmbh Clean room clothing preventing emission of harmful gas and particles from body of wearer
EP1764136A1 (en) * 2005-09-16 2007-03-21 Blücher GmbH functional textile fabric provided with active microcapsules and its use
US7670968B2 (en) 2005-09-16 2010-03-02 Blucher Gmbh Functional textile material provided with microcapsules containing an active ingredient and use thereof

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