CA2301150A1 - Clean room suit with adsorbent properties - Google Patents

Clean room suit with adsorbent properties Download PDF

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Publication number
CA2301150A1
CA2301150A1 CA002301150A CA2301150A CA2301150A1 CA 2301150 A1 CA2301150 A1 CA 2301150A1 CA 002301150 A CA002301150 A CA 002301150A CA 2301150 A CA2301150 A CA 2301150A CA 2301150 A1 CA2301150 A1 CA 2301150A1
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CA
Canada
Prior art keywords
clothing
activated carbon
clean atmosphere
layer
particle filter
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.)
Abandoned
Application number
CA002301150A
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French (fr)
Inventor
Ernest De Ruiter
Jonas Tornblom
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Calgon Carbon Corp
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Individual
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Filing date
Publication date
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Publication of CA2301150A1 publication Critical patent/CA2301150A1/en
Abandoned legal-status Critical Current

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    • 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
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear
    • A41D31/04—Materials specially adapted for outerwear characterised by special function or use
    • A41D31/14—Air permeable, i.e. capable of being penetrated by gases
    • A41D31/145—Air permeable, i.e. capable of being penetrated by gases using layered materials
    • 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
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
    • 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
    • B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
    • B01J20/26—Synthetic macromolecular compounds
    • B01J20/262—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon to carbon unsaturated bonds, e.g. obtained by polycondensation
    • 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
    • B01J20/28023—Fibres or filaments
    • 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
    • B01J20/28054—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 surface properties or porosity
    • B01J20/28078—Pore diameter
    • B01J20/2808—Pore diameter being less than 2 nm, i.e. micropores or nanopores
    • 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
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3202—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the carrier, support or substrate used for impregnation or coating
    • B01J20/3206—Organic carriers, supports or substrates
    • B01J20/3208—Polymeric carriers, supports or substrates
    • B01J20/3212—Polymeric carriers, supports or substrates consisting of a polymer obtained by reactions otherwise than involving only carbon to carbon unsaturated bonds
    • 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
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3231—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the coating or impregnating layer
    • B01J20/3234—Inorganic material layers
    • B01J20/324—Inorganic material layers containing free carbon, e.g. activated carbon
    • 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
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3231—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the coating or impregnating layer
    • B01J20/3242—Layers with a functional group, e.g. an affinity material, a ligand, a reactant or a complexing group
    • B01J20/3244—Non-macromolecular compounds
    • B01J20/3246—Non-macromolecular compounds having a well defined chemical structure
    • B01J20/3248—Non-macromolecular compounds having a well defined chemical structure the functional group or the linking, spacer or anchoring group as a whole comprising at least one type of heteroatom selected from a nitrogen, oxygen or sulfur, these atoms not being part of the carrier as such
    • 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
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3231—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the coating or impregnating layer
    • B01J20/3289—Coatings involving more than one layer of same or different nature
    • 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
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3291—Characterised by the shape of the carrier, the coating or the obtained coated product
    • B01J20/3297—Coatings in the shape of a sheet
    • 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
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/34—Regenerating or reactivating
    • B01J20/3425—Regenerating or reactivating of sorbents or filter aids comprising organic materials
    • 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
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/34—Regenerating or reactivating
    • B01J20/345—Regenerating or reactivating using a particular desorbing compound or mixture
    • B01J20/3475—Regenerating or reactivating using a particular desorbing compound or mixture in the liquid phase

Abstract

In order to develop a garment for a cleanroom, capable of absorbing not only particles but also gas emitted by human beings and which interferes with obtaining an extra-pure atmosphere inside a cleanroom, it is suggested that, in addition to the airy medium for filtering particles, an adsorption layer of activated carbon be applied onto the side opposite the support. Said activated carbon is sheet material of activated carbon fibres. In order to fully remove ammonia also, the layer for filtering particles is impregnated preferably with a non volatile organic acid characterized by a good tolerance from a physiological point of view, for example citric acid.

Description

JUL-18-2888 11:2? DENNISON i MACBETH 416 368 1645 P.06i13 Clean room suit with adsorbent properties The man skilled in the art is aware of the fact that, in the process of manufacturing electronic components, especially high-quality microchips, the reject rate is increased not only by particles, but also by gases s~ueh as ammonia, volatile organic acids and siloxanes, even if these are only present in the ppb range. While these gases can be Fltered out by special adsorption filters in the air supply, this does not take man into account as a source of enussions. The clean room suits in use today merely prevent the emergence of particles, especiatly skin particles, but not the cmergertce of gases. Man releases gases, including ammonia, which is harmful, and orbanic acids, via his skin (sweat), digestive system and respiration. Also, siloxanes, which are believed to originatE from skin and hair sp~~ays, deodorants and certain cosmetics, lead to faulty batches in production in ultra-clean rooms.
It is thus the object of the present invention to provide a clean room suit which is effective not only against particles, but also against gases enutted by the wearer.
The solution to this problem is a clean room swit comprising a particle filter layer with good breathing properties and, on the side facing the wearer, an adsorption layer of activated charcoal. Clean room suits are known in the art. They may be disposable or reusable articles. Among the former .is a dense spun-bonded fabric made from very thin polyethylene fibres (Tyvek~. Reusable, i.e. washable, clean room suits are as a rule woven or knitted fabrics made from synthetic fibres such as polyesters, nylon, polypropylene, polyethylene, aramides and acrylic fibres.
In addition, non-woven fabrics are also produced from very Ftne endless fibres made from these materials.
Features which clean room suits have in conuz~on are the fact that they retain all the particles and aerosols emitted by the body, and that the clean room suit itself must likewise not release any particles or decomposition products; it must be light in weight, wear and tear resistant and pleasant to wear. Known materials for the production of clean room suits are UCX, SCX, 1-II;PA and U1.PA clotlu and dle PURITA materials_ Even though particles of 0,1 pm and more need to be retained completely, sufficiently good breathing properties must be preserved.
polyester particle filter woven or knitted fabrics of this kind have a rri<~ss per unit area of 50 to 200 g/m2, and especially 100 to 7 50 g/mZ.

JUL-10-2000 11:27 DENNISON i MRCBETH 416 368 1645 P.07i13 Protective suits are known from the military sector wlueh are intended to protect the wearer against skin poisons. A blanket filter which is particularly suitable for this purpose is described in the German patent 33 04 349. The skin poisons referred to are sparingly volatile substances which arc easy to adsorb. It could not therefore be expected that a protective suit which protects the skin against chemical toxins and warfare agents would also prevent the escape of readily volatile substances emitted by the skin anal would enable the adsorption of gases such as ammonia even in the ppb range.
lU For the purposes of the present invention, the adsorption layer of activated charcoal can be attached to a very air-permeable area-measured textile material or directly to the inside of the material of the clean room suit. In accordance with Dlr C 33 349, the activated charcoal of the adsorption layer can, for example, take the form of grains of activated charcoal, and especially fine-pored spheroidal charcoal with diameters of 0,3 to 1 mm and an internal surface area of more than 500 mz/g, which are attached to a very air-permeable textile substrate by means of an adhesive applied discontinuously or intermittently_ The substrate can be laminated to the inside of the particle filter layer and additionally covered with a light fabric or can even be worn as an undergarment beneath the particle filter layer. A
protective material of this kind is described in the German utility model G 89 16 25~_ The grains of activated charcoal c:an also be fixed directly to the inside of the particle filter in accordance with the process of DE G 33 04 349 by means of an adhesive applied discontinuously.
A different means of Forming the adsorption layer of activated charcoal, which is l~~nown per sc, is the process of "charcoal printing", which is known from DE

11 322, in which the air-permeable substrate is printed with a paste consisting of tine activated charcoal and a binder. 'This is also a good possibility for clean room suits which are only used as disposable suits and which consist, for example, of calendered thin polyoleFn non-woven fabrica and whiclx can then be printed on the islside, in accordance with the invention, with a large number of small heaps of charcoal between 0,2 and 0,8 mm in diameter.
Finally, the layer of activated charcoal on the inside of the clean room suit with the particle filter layer with good breathing properties can also consist of a th.i n, and in partiwlar reticulated, foam impregnated with a suspension of activated charcoal powder and binder and coated with the powdered charcoal in this way.

JUL-10-2000 11:28 DENNISON i MRCBETH 416 36S 1645 P.08i13 The ideal solution is to have an adsorption layer comprising an activated charcoal non-woven fabric or area-measured textile material of activated charcoal covered ora both sides with fabric, since these materials have a huge external surface area, where the adsorption bebins, compared to granular activated charcoal, so that the probability of a collision with the charcoal is extremely great. In the case of area-measured textile materials of activated charcoal, the greater part of the pore system consists of very narrow micro-pores with diameters of less than 2 nm, and in particular less than 1 nm. Since no great capacity is required, an internal BET
surface area of less than 1200 m2/g is sufFcient, especially since the mechanical load-bearing capacity declines as the activation increases.
A product -whicl-t .is particularly suitable for the presem invemion is Activ-ated Char-coal Cloth (ACC) from Charcoal Cloth Ltd. (sec Filtration and Separation 1986, pp.
I C~~ ~65~.
While the layer of activated charcoal in the various designs is very effective for the majority of volatile products released by human beings, ammonia is nevertheless not adsorbed particularly well. In a preferred embodiment of the invention, it is therefore provided for the particle Flter layer of the clean room suit with, good breathing properties to be impregnated with a physiologically compatible, non-volatile organic acid. The same can also be done with the activated charcoal adsorption layer of the clean room suit.
Suitable for the reaction with the ammonia and, where applicable, with lower amines are organic acids with high boiling paints or those which are solid at room temperature with a pH of less than 5, and especially less than ~, and which are physiologically harmless if they should come into contact with the skin. These acids need tv be capable of binding ammonia in the form of the corresponding ammonium salts. If the whole clean room suit or only the particle filter layer impregnated with; the acids is washed for the purpose of regeneration, these ammonium salts are easily washed out, and the clean room suit can subsequently be impregnated with the acid again.
Examples of suitable acids are citric acid, tartaric acid, malic acid, lactic acid, mandelic acid, phthalic acid, isophthalie acid, terephthalic acid, suberic acid, malonic acid, ascorbic acid, aspartic acid, benzoic acid and glutamic acid.
Citric acid 3S is preferred, and this aspect of the invention is also explained below with reference to citric acid by way of example.

JUl_-10-2800 11:28 DENNISON i MRCBETH 416 368 1645 P.09i13 It has been found that aetiv~ated charcoal impregnated with citric acid is particularly suitable for adsorbing ammonia and volatile amines. 1t can be presumed that moisture adsorbed in the process plays an important part. The advantages of citric acid impregnation are. it is unproblematic when worn close to the skin, Fabrics not damaged, and there is the possibility of re-impregnation during the rinsing step after washing. For the initial impregnation or - in the case of reusable clean room suits -for the re-impregnation after washing, it is advisable to use a 0,5 to 20, and especially 1 to I0, per cent by weight solution of citric acid. 'The same applies, mutatis mutandis, to the other organic acids mentioned.
It was not found that any c.itrie acid adhering to the outer particle filter layer became detached in the form of ultra-fine crystals which contaminated the ultra-clean air. ~otheravise, only the adsorption layer should be impregnated, which would in turn make it necessary to have a two-part clean room suit, with the particle and adsorption filter layer separated.
Citric acid impregnation of the particle filter Iayer is sufficient to prevent, more or less completely, the emission of ammonia and amines escaping from the skin.
This finding makes it possible to design a two-part clean room suit consisting, on the one hand, of a polyester suit impregnated with citric acid to prevent Lhe emission c.>F
particles and, on the other hand, with the <non-impregnated) adsorption layer beneath it to bind the other vohZtile body emissions. Since impregnating the activated charcoal tends in general to impair the adsorptive properties, this alternative should be regarded as a positive feature. As it can be assumed that the particle filter layer worn on the outside will be washed more frequently than the adsorption layer and that only the particle filter layer needs to be re-impregnated, the separation into a particle and ammonia filter layer and an adsorption filter layer makes sense.
The man skilled in the art has various possible methods at his disposal for covering the activated charcoal layer on both sides. Merely by way of example, one might mention the possibility of providing the fabric cover with melt adhesive points printed on and then performing thermal lamination. It is also possible to use the particle filter layer itself as the cover For the activated charcoal layer. In this case, however, the advantages of separate washing are lost.

JUL-10-2000 11:28 DENNISON i MRCBETH 416 368 1645 P.10i13 Finally, it should also be mentioned that attention muse be paid, when washing the adsorption layer, to ensuring that the pore structure is not excessively burdened by surfactants. The purpose of washing is not so much to achieve a visual effect as to remove body grease, sweat components and other body discharges. In view of the large range of detergents and surfactants available, the man skilled in the art needs to make his own Choice by means of experiments. As far as possible, pure surfactants, such as lauryl sulphate, should be used. Good results were obtained with mixtures of ethanol and water.
A polyester-based fabric suitable for clean room suits (mass per unit area approx.
100 g/m~ was printed internuttcntly, in accordance with DE C 33 04 349, with an adhesive substance based on Impranil I-IS 62 and imprafix HISC, both products available from Bayer AG, using a 25-mesh template (application weight approx.
25 glmz, coverage approx. 30 %). A fine-pored, very abrasion-resistant spheroidal charcoal on the basis of pitch, with an internal surface area of approx. 1,200 rrr2/g and a diameter of 0,3 to 0,5 mm, was scattered over the sticky heaps and subsequently cured, The application weight of the spheroidal charcoal was 170 g/m2. The spheroidal charcoal is described in US A 1 468 y82, inter alia.
In the same way, a spheroidal charcoal was used which was manufactured in conformity with DE 43 28 21.9 AX and had micro-pore diameters of around 0,5 nm.
The internal surface area ought to be at least 500 n'rz/g, preferably at least 900 nzZ/g, while sphere diameters of 0,3 to 1,0 mm arc convenient.
Glean room suits were produced from the material charged with activated charcoal and compared In practice with normal clean room suits made from the same material but not charged with activated charcoal- ~tll~ereas in the latter ease, an emission of alkaline (NHS and acidic volatile substances produced by the wearer was Found-in the ppb range, these substances were absent when tl-rc: suit according to tie invention was worn. 1'he experiment was conducted ever a period of 4 weeks, with the suits being washed a total of 4 times with lauryl sulphate added.
The suit according to the invention was subsequently impregnated with a 1 %
citric acid solution. In this suit, no emissions of NH3 at alI could be found any longer. The suit was washed, re-impregnated with 1 % citric acid during the rinsing stage and dried. Here too, no measurable emission of any kind whatsoever could be found.

JUL-10-2000 11:29 DENNISON i MRCBETH 416 368 1645 P.11i13 In addition, a clean room suit was taitored which, beneath the particle filter layer, contained an adsorption layer of a 40 g/mz activated charcoal non-woven material covered by a 30 g/m2 polyester knitted material. When worn experimentally, an emission was detected which it was no longer possible to measure in practice, and which was completely suppressed after impre~mation with. citric acid as described in the previous example.

Claims (10)

Claims
1. Clothing for clean atmosphere comprising a breathing particle filter layer and an activated carbon adsorption layer on the side turned to the person wearing the clothing.
2. Clothing for clean atmosphere according to claim 1, characterized in that the activated carbon adsorption layer, is made of a textile fabric consisting of activated carbon fibers.
3. Clothing for clean atmosphere according to claim 1 or 2, characterized in that the textile fabric of activated carbon fibers is an activated carbon fleece, fabric or knit fabric.
4. Clothing for clean atmosphere according to claims 1 to 3, characterized in that the inner surface of the activated carbon fibers is mainly made of micropores with a diameter below 2 nm.
5. Clothing for clean atmosphere according to claims 1 to 4, characterized in that the breathing particle filter layer is made of a dense polyester microfibre fabric or knit fabric.
6. Clothing for clean atmosphere according to Claims 1 to 5, characterized in that the particle filter layer is impregnated with a physiologically compatible non volatile organic acid.
7. Clothing for clean atmosphere according to claims 2 to 6, characterized in that the adsorbing layer of activated carbon 15 impregnated with a physiologically compatible non volatile organic acid.
8. Clothing for clean atmosphere according to claims 1 to 7, characterized in that the physiologically compatible non volatile organic acid is citric acid.
9. Clothing for clean atmosphere according to claims 1 to 8, characterized in that the particle filter layer and/or the adsorbing layer is impregnated with a 0,5 to 20, especially with a 1 to 10 wt%, citric acid.
10. Utilization of a clothing for clean atmosphere made of a breathing particle filter layer in combination with an air-permeable activated carbon adsorption layer being on the side turned to the person wearing the clothing for protection of clean rooms from endogenous human emissions.
CA002301150A 1997-07-31 1998-02-25 Clean room suit with adsorbent properties Abandoned CA2301150A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19732927.6 1997-07-31
DE19732927A DE19732927A1 (en) 1997-07-31 1997-07-31 Clean room suit with adsorbing properties
PCT/EP1998/001068 WO1999006136A1 (en) 1997-07-31 1998-02-25 Garment with absorbing features, for use in a cleanroom

Publications (1)

Publication Number Publication Date
CA2301150A1 true CA2301150A1 (en) 1999-02-11

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ID=7837434

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002301150A Abandoned CA2301150A1 (en) 1997-07-31 1998-02-25 Clean room suit with adsorbent properties

Country Status (5)

Country Link
EP (1) EP1037698A1 (en)
JP (1) JP2001524609A (en)
CA (1) CA2301150A1 (en)
DE (1) DE19732927A1 (en)
WO (1) WO1999006136A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017223266A1 (en) * 2016-06-24 2017-12-28 Micronshield Llc System and garment for minimizing clean environment contamination

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10102096B4 (en) * 2001-01-18 2007-08-09 BLüCHER GMBH Odor-absorbing workwear
US10478517B2 (en) 2008-09-19 2019-11-19 Fipak Research And Development Company Method and apparatus for purging unwanted substances from air
WO2013134765A1 (en) * 2012-03-09 2013-09-12 Fipak Research And Development Company Method and apparatus for purging unwanted substances from air
DE102018102464B3 (en) 2018-02-05 2019-06-06 Harting Electric Gmbh & Co. Kg Cable strain relief and shield attachment for a connector housing

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4856509A (en) * 1985-07-08 1989-08-15 Lemelson Jerome H Face mask and method
DE8916256U1 (en) * 1989-07-21 1996-04-11 Bluecher Hasso Von Underwear to protect against chemical poisons
JPH0571002A (en) * 1991-09-04 1993-03-23 Fujitsu Ltd Clothing for clean atmosphere
DE4310110A1 (en) * 1992-07-07 1994-01-13 Kaercher Gmbh & Co Alfred Multi-layer, textile, gas-permeable filter material against chemical pollutants

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017223266A1 (en) * 2016-06-24 2017-12-28 Micronshield Llc System and garment for minimizing clean environment contamination

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Publication number Publication date
JP2001524609A (en) 2001-12-04
EP1037698A1 (en) 2000-09-27
DE19732927A1 (en) 1999-02-04
WO1999006136A1 (en) 1999-02-11

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