System of apparel for an technically clean room

Abstract

The invention relates to a clothing system (1) for a technically clean room, comprising outer clothing (2) and intermediate clothing (3) which is intended to be worn beneath the outer clothing (2), wherein - the outer clothing (2) is manufactured in such a way that it is dust-tight for clean rooms and also has a moisture barrier (4) which blocks the escape of moisture from the inside to the outside, - the intermediate clothing (3) has a conductive layer (5) made of synthetic fibers, - at least one storage layer (6) made of a moisture-absorbing and moisture-storing material is located between the moisture barrier (4) and the conductive layer (5), wherein the outer clothing (2) and intermediate clothing (3) are designed in such a way that they can be put on and taken off separately from one another. The invention further comprises a method.

Description

[0001] The invention relates to a clothing system for a technically clean room, preferably for a clean room or a clean room, and a method for working in a technically clean room.

[0002] Cleanrooms are widely known. They serve to provide a contamination-free environment for the manufacture or maintenance of objects that must not be contaminated. They also aim to drastically reduce the potential negative influences of the environment, applied processes, and procedures on a sensitive product or activity.

[0003] For example, in the space industry, components, instruments, and entire satellites are manufactured that have high requirements regarding contamination, heat, radiation (e.g., UV), humidity, access, and visibility. This means they require special protection during work and testing steps. This is achieved with a clean environment whose parameters, such as particle freedom, chemical composition, chemical purity, and heat, can preferably be adjusted. However, products and manufacturing processes in other technical fields, such as semiconductor technology, pharmaceuticals, or medical technology, may also be subject to similar requirements.

[0004] It may happen that low particle contamination is also required, along with low humidity. A clean room with such a requirement is also referred to as a "dry room." Dry rooms are used, for example, in the development and production of lithium batteries, which must be protected from corrosion. For example, a dry room in the manufacturing process of battery technology for e-mobility should not only meet the requirements of controlled, specified contamination, but also maintain a relative humidity of at least 15% to 5% (depending on the process).

[0005] By conditioning the supply air or recirculated air using ventilation and air conditioning technology, a maximum limit for the humidity in a dry room is reached, which requires very high energy expenditure. This results in correspondingly high energy costs. Humidity can be introduced into a clean or clean room, particularly by people. People are needed at various points in a production process for work or inspections. They release a lot of moisture into their environment through their skin and perspiration. This can be problematic for the climate in a clean or clean room, and a lot of energy must be expended to remove this introduced moisture from the clean or clean room.

[0006] It is an object of the present invention to provide a clothing system for a clean room and a method for working in a clean room, with which the disadvantages described above are avoided.

[0007] This object is achieved by a clothing system according to patent claim 1 and a method according to patent claim 13.

[0008] First of all, it should be stated that the invention relates to a clothing system for a 'technically clean room'. This is a low-dust room or a room with controlled cleanliness or a room with contamination control. One could also say that it is a room in which a predetermined degree of technical cleanliness prevails. In particular, a technically clean room is a clean zone (according to VDA 19 or EN ISO 16232), a clean room (according to VDA 19 or EN ISO 16232) or a clean room (according to EN ISO 14644). Preferably, the room in question is a clean room, or a clean room according to ISO 9 with fewer particles per cubic meter than 35,200,000 < 0.5 µm, 8,320,000 < 0.5 µm and 293,000 < 5.0 µm, ISO 8 with fewer particles per cubic meter than 3,520,000 < 0.5 µm, 832,000 < 0.5 µm and 29,300 < 5.0 µm, ISO 7 with fewer particles per cubic meter than 352,000 < 0.5 µm, 83,200 < 0.5 µm and 2,930 < 5.0 µm, ISO 6 with fewer particles per cubic meter than 1,000,000 < 0.1 µm, 237,000 < 0.2 µm, 102.000 < 0.3 µm, 35,200 < 0.5 µm, 8,320 <1.0 µm and 293 < 5.0 µm, ISO 5 with fewer particles per cubic meter than 100,000 < 0.1 µm, 233,700 < 0.2 µm, 10,200 < 0.3 µm, 3,520 < 0.5 µm and 832 <1.0 µm, ISO 4 with fewer particles per cubic meter than 10,000 < 0.1 µm, 2,370 < 0.2 µm, 1,020 < 0.3 µm, 352 < 0.5 µm and 83 <1.0 µm, ISO 3 with fewer particles per cubic meter than 1,000 < 0.1 µm, 237 < 0.2 µm, 102 < 0.3 µm, and 35 < 0.5 µm, ISO 2 with fewer particles per cubic meter than 100 < 0.1 µm, 24 < 0.2 µm and 10 < 0.3 µm, ISO 1 with fewer particles per cubic meter than 10 < 0.1 µm.

[0009] A clothing system according to the invention for a technically clean space (preferably a cleanroom or clean room) comprises outer clothing and intermediate clothing, which is intended to be worn underneath the outer clothing. The outer clothing is designed to be dustproof for clean rooms and also has a moisture barrier that blocks the escape of moisture from the inside to the outside. The intermediate clothing has a conductive layer made of synthetic fibers. Between the moisture barrier and the conductive layer there is at least one storage layer made of a moisture-absorbing and moisture-storing material. It is necessary that the outer clothing and intermediate clothing be designed so that they can be put on and taken off separately.

[0010] The clothing system therefore features outerwear that is not connected to the intermediate garment, allowing the two garments to be put on and taken off separately. The outerwear and intermediate garment are therefore two separate items of clothing, or rather, they are separated within the clothing system. This not only has the advantage that the intermediate garment can be changed, but also that there is air between the intermediate garment and the outerwear, allowing for additional separation between the wearer's moisture and the outerwear. It should be noted that the intermediate garment can also be worn as underwear.

[0011] The outerwear is essentially the simplest design known in the state of the art. It must be manufactured in such a way that it is (sufficiently) dust-proof for cleanrooms. It must also have a moisture barrier that prevents moisture from escaping from the inside to the outside. Such dust-proof clothing with a moisture barrier can be realized, for example, with coated knitwear or woven fabric made of a synthetic fiber.

[0012] The intermediate garment must have a conductive layer made of synthetic fibers. Such a conductive layer wicks moisture away from the body. The synthetic fibers are designed to achieve an even distribution of moisture throughout the conductive layer. The material of the conductive layer itself should absorb little moisture and be quick-drying. Generally, well-known synthetic fibers that do not absorb moisture can be used. The layers are preferably made of a number of continuous fibers or threads (e.g., as knitted, warp-knitted, or woven fabrics) because such fibers are quite stable. Short fibers (so-called "staple fibers") break or detach relatively quickly and are therefore rather disadvantageous. With optimal fiber spacing, moisture transport is high and moisture retention is low. If the spacing is too large, however, wetness can be felt on the skin.

[0013] Such clothing is essentially known in the art and can, for example, be a shirt and pants made of polyester, polyamide, and / or elastane. The conductive layer is designed to wick moisture away from the wearer's body, so that the wearer always feels dry on their skin. Preferably, the conductive layer is manufactured in such a way that increasing density creates a capillary effect away from the body. This kind of pull of moisture away from the body is also created by the storage layer.

[0014] The storage layer, made of a moisture-absorbing and moisture-storing material, can be made of cotton, viscose, and / or modal, for example, and essentially functions like a sponge. Moisture that has been drawn away from the body by the conductive layer can be absorbed by the storage layer. Clothing made with such a storage layer is well known, for example, a cotton shirt and pants. The thicker the barrier layer, the more moisture can be absorbed (absorbed) and stored.

[0015] In general, it can be summarized that the conductive layer is designed to distribute moisture quickly and evenly, and the storage layer is designed to absorb and store the moisture from the conductive layer. This should be done in such a way that the moisture does not evaporate quickly. This creates an additional layer that makes it difficult for water vapor to penetrate. In this regard, it is preferable to use fibers for the storage layer that swell upon absorbing moisture. This reduces the gaps in the textile and ultimately seals them.

[0016] In addition to separating outerwear and mid-layer clothing, it is important for the clothing system that the layers are arranged in the specified order: conductive layer on the inside, moisture barrier on the outside, and the storage layer in between. It is particularly preferred for the mid-layer clothing to have the storage layer and be manufactured as a two-layer (or multi-layer) garment with the conductive layer on the inside and the storage layer on the outside. This has the particular advantage that moisture can be drawn from the conductive layer into the storage layer, which increases the dry feeling on the skin. Separating outerwear and mid-layer clothing requires that there is air between the moisture barrier and the storage layer, or that these layers only touch in a few places. This means that the moisture barrier is not in direct contact with moisture, at least in large areas, which increases its barrier effect.

[0017] While it is possible to attach the storage layer directly to the outerwear (i.e., not to the intermediate garment), this design has the disadvantage compared to the aforementioned design in that the moisture barrier comes into direct, extensive contact with moisture over time and could therefore release more moisture to the outside. It would be better if the outerwear had an additional conductive layer on its inside (i.e., it was also designed with at least two layers). This prevents direct contact between the storage layer and the moisture barrier.

[0018] The outerwear can be a coverall, optionally with a separate or sewn-on hood. To meet cleanliness and purity requirements (according to VDA-19 or ISO 14644), the outerwear should ensure the best possible abrasion resistance and also have good filtration performance to prevent fibers and particles from diffusing or migrating through the textile from the inside to the outside. As mentioned, such clothing is well known. In addition, the outerwear has a moisture barrier, which should act as a water vapor barrier, since high humidity prevails within the outerwear due to body heat. Overall, as little moisture (liquid or gaseous phase) as possible should diffuse through the outerwear. The basis weight of the textile for the outerwear (e.g., coverall and hood) could, for example, be between 80 g / m² and 180 g / m².Particular care should be taken to ensure that as little water vapor as possible can escape through the edges of openings in outerwear, e.g. arm and leg cuffs, zipper covers, collar area or face cutouts.

[0019] The intermediate garment should be a jumpsuit or a combination of long-legged trousers with a long-sleeved top (long-sleeved shirt or long-sleeved sweater). The basis weight (conductive layer and storage layer combined) can be between 100 g / m² and 300 g / m².

[0020] With regard to ESD properties, outerwear and especially intermediate garments should be designed and manufactured to ensure a conductive connection between extremities, e.g., arm-to-arm and / or leg-to-leg and / or leg-to-arm (diagonal). This connection should be designed so that it can be measured by measuring the surface resistance. Ideally, the surface resistance should always be between 1 MΩ (megaohm) and 1 GΩ (gigaohm) (according to DIN EN 1149-1:2006-09).

[0021] When work is carried out in the clothing system, sweat is wicked away from the skin by the conductive layer and absorbed by the storage layer, which acts like a sponge. The absorbed liquid cannot escape through the moisture barrier and remains between the wearer's skin and the moisture barrier (mainly in the storage layer). If the storage layer has reached its absorption limit, work should be interrupted in a technically clean room and the clothing system changed outside the technically clean room. In principle, it is only necessary to change the item of clothing with the storage layer. For example, only intermediate clothing (with the storage layer) can be changed, at least if the outer clothing has absorbed no or very little moisture.

[0022] A method according to the invention is used for working in a technically clean room, in particular a clean room, using a clothing system according to the invention. It comprises the following steps: a) putting on the clothing system with intermediate clothing and outer clothing, b) carrying out the work until the storage layer has reached a predetermined degree of moisture, which is preferably determined by means of a sensor unit, or until a predetermined period of time has elapsed, c) taking off the outer clothing, d) taking off at least the storage layer, preferably the intermediate clothing, e) putting on a new storage layer, preferably a new intermediate clothing, and then one of the outer clothing, f) repeating steps b) to e), wherein the outer clothing is preferably not changed.

[0023] Since the intermediate garment is worn inside the outer garment, it should also be put on first. It can be worn as underwear or over underwear. Once the intermediate garment (e.g. a long-sleeved shirt and long-legged trousers) and outer garment (e.g. a jumpsuit) are put on, work can be carried out, at least until the storage layer has reached a predetermined level of humidity. This can be determined using a sensor unit, e.g. a humidity sensor. In particular, wires can be used for this purpose which are actually electrically insulated from one another and are preferably present in the storage layer as anti-static protection. The wetter the storage layer, the lower the resistance between these wires. However, work can also simply continue until a predetermined period of time has elapsed.

[0024] Then the outer garment and at least the storage garment are removed. If the storage garment is part of the intermediate garment, this must be removed. Then a new storage garment (possibly in the form of new intermediate garments) is put on, and the outer garment is put on again. Different outer garments can be put on, but the same outer garment can also be reused. The new garments then form the clothing system for the ongoing work.

[0025] The invention thus enables work in a dry room that, thanks to an improved clothing system, introduces less moisture into the room than before. The clothing system can be composed of familiar clothing components or of clothing components with a special layering of materials.

[0026] Further, particularly advantageous embodiments and developments of the invention emerge from the dependent claims and the following description, wherein the claims of one claim category can also be developed analogously to the claims and description parts to form another claim category and, in particular, individual features of different embodiments or variants can be combined to form new embodiments or variants.

[0027] According to a preferred embodiment of a clothing system, the intermediate garment is a textile with at least two layers, the inner side of which (facing the skin) is formed from the conductive layer so that the wearer has a dry feeling on the skin and is firmly bonded to the storage layer. The storage layer can form the outer side (e.g., in a two-layer textile), but additional layers can also be present, e.g., an additional conductive layer as the outer layer to retain moisture within the intermediate garment, or additional storage layers made of other materials. The intermediate garment can, however, also have an additional moisture barrier on its outer side.

[0028] The weight proportion of the layers in the intermediate clothing can vary considerably, also because the layers are made of different materials.

[0029] Preferably, the weight fraction of the conductive layer is less than that of the (dry) storage layer, preferably less than 40% (or even 30% or less) of the weight fraction of the storage layer.

[0030] As far as the fit of the intermediate garment is concerned, it should ideally be designed to sit as close as possible against the skin. However, freedom of movement should not be restricted. The function of the conductive layer (particularly the capillary forces acting within it) can be particularly effective when it fits tightly against the body, because then fluid, i.e. sweat, can be wicked away in direct contact with the fabric. Furthermore, it is preferable for parts of the intermediate garment to be joined together using flat seams, especially in the upper part, e.g., in the shoulder area, to prevent friction or pressure points.

[0031] The outerwear is preferably made of a polyester fabric, which is particularly provided with a moisture-proof coating. Such a polyester fabric is comparatively abrasion-resistant and can be easily manufactured to provide the required filtration effect.

[0032] A preferred clothing system is characterized by the conductive layer and / or the storage layer being made of knitted fabric, preferably warp-knitted or crocheted, or woven fabric. At least these two layers are not made of nonwovens. Preferably, all layers of the clothing system are made of warp-knitted or crocheted fabric. Woven, warp-knitted, or crocheted textiles are generally significantly more stable, abrasion-resistant, and tear-resistant than nonwovens. Furthermore, nonwovens are often more difficult to clean or wash.

[0033] A preferred clothing system is preferably designed so that there is a conductive connection from arm to arm and / or leg to leg and / or leg to arm, and the surface resistance is preferably between 1 MΩ (megaohm) and 1 GΩ (gigaohm). This allows the extremities to be kept at a common potential and the risk of charge transfer can be reduced. This is very advantageous because the high dryness in a drying room always means there is a risk of charging, as neutralization via air humidity no longer takes place. The conductive connection preferably comprises electrically conductive elements in the form of fibers, wires, or electrodes that run through the clothing in question.

[0034] In a preferred clothing system, the outer garment is a jumpsuit. A hood may be attached to the jumpsuit, or it may be separate from the jumpsuit and combined with it. The hood encloses the wearer's head except for a cutout for the face.

[0035] The surface weight of the outerwear is preferably between 80 g / m² and 180 g / m². This makes the outerwear comparatively light.

[0036] The basis weight of the intermediate garment is preferably between 100 g / m 2 and 300 g / m 2 . In an embodiment in which the conductive layer and storage layer are present in the form of a two- or multi-layer textile, the weight proportion of the conductive layer is preferably greater than 20%, preferably greater than 25%.

[0037] The storage layer (as part of a multi-layer textile or separately) is preferably heavier than the conductive layer. It is preferably more than 1.5 times heavier (when dry), and more preferably more than 2 times heavier. The storage layer is designed to absorb moisture. A certain amount of material should be present to ensure sufficient moisture absorption. The heavier the (dry) storage layer, the more material is present and the more moisture it can absorb.

[0038] A preferred clothing system is characterized by a minimum water vapor transmission resistance R et of the outerwear of 2 m 2 < Pa / W, preferably 3.5 m 2 < Pa / W (see DIN EN ISO 11092:2014-12). In particular, the water vapor transmission through materials due to air flow (convection current) can be taken into account here. To this end, the outerwear should have as few openings as possible, i.e. for the head or face and, if necessary, for the extremities, but beyond that only one closable opening for dressing. A double zipper (inside and outside) is advantageous. The zipper should be covered on both the inside and the outside. A snap fastener has disadvantages, as there are always holes between the snap fasteners.

[0039] As far as the seams are concerned, it is preferable for them to be as tight as possible. This can be achieved, in particular, by taping or welding. However, for washing outerwear, it may be advantageous to execute the seams as double seams without welding or gluing, preferably as tunnel or fell seams.

[0040] A preferred clothing system is characterized in that the intermediate clothing is an overall or a combination of a long-sleeved shirt and trousers with long legs, preferably with the material of the outer side comprising cotton, viscose or modal and forming the storage layer.

[0041] A preferred clothing system is characterized in that the clothing system, preferably on the storage layer, has a sensor unit capable of measuring the humidity within the outer clothing, in particular on the storage layer. If the humidity exceeds a predetermined limit, an alarm is preferably issued to the wearer of the clothing system to indicate that the storage layer (or the intermediate clothing, if applicable) should be changed. Preferably, the storage layer or an intermediate clothing (preferably a multi-layer intermediate clothing) is designed to be antistatic by means of electrically separated elements in the form of fibers, wires, or electrodes, and a resistance between the electrically separated elements is measured as a measure of the humidity.

[0042] An alarm can be issued via an alarm unit that is integrated into the clothing system, particularly in the outerwear, or via a separate alarm unit, e.g. a mobile device with a corresponding app that receives and evaluates the data from the sensor unit.

[0043] A preferred clothing system is characterized by the fact that the clothing system has an additional layer (e.g., an air layer) between the moisture barrier and the storage layer. This uses the space between the intermediate clothing and the outer clothing as an additional barrier, since the moisture from the barrier layer cannot easily transfer to the moisture barrier. This layer is preferably an additional conductive layer, which is preferably designed to conduct moisture from the moisture barrier to the storage layer. This additional layer makes it more difficult for the moisture barrier to touch the storage layer, and there is no longer any direct contact between the moisture in the storage layer and the moisture barrier.

[0044] A preferred clothing system is characterized in that the moisture barrier has a water-repellent coating and / or the conductive layer has a moisture-conducting coating and / or the storage layer has a water-absorbing coating. These coatings can be formed using suitable chemicals applied to the layers or fibers. A membrane can also be used instead of or in addition to a coating. This membrane should be (preferably) a water-impermeable membrane, preferably bonded to the moisture barrier, e.g., in the form of a polyester layer.

[0045] All outerwear and intermediate garments should fit snugly against the wearer's body to prevent particulate contamination (dry, e.g. dust) or excessive moisture from escaping. In particular, cuffs and leg ends should fit tightly to prevent moisture from escaping. Elastic knit or warp-knit fabric and / or elastic bands are preferred. It is also preferred that cuffs and leg ends are electrically conductive and are designed to provide an electrically conductive connection between the clothing system and the wearer. The same applies to the collar and any hood or closure covering the field of vision. These should also fit tightly and be adjustable. Adjustment can be achieved, for example, using a strap and buckle.

[0046] As far as cuffs are concerned, care should be taken to ensure that the intermediate garment or the thermal storage layer does not protrude from the outer garment at any point. This means that the intermediate garment or the thermal storage layer and the outer garment should be designed in such a way that, when worn as intended, the intermediate garment or the thermal storage layer does not protrude from any opening in the outer garment. In particular, the cuffs on the arm and leg openings of the outer garment should be designed to fit snugly against the body, preventing inner textile layers from slipping out. Knitted cuffs should preferably be avoided on outer garments, or they should only be made from abrasion-resistant materials that can be made into corresponding cuffs at openings.

[0047] According to a preferred embodiment, the storage layer is thicker in certain areas than in others. These areas are preferably those where a particularly high level of perspiration is expected, in particular on the back, underarms and backs of the knees, forearms, wrists, buttocks, thighs and / or in the neck area. There, the storage layer is preferably more than 1.5 times thicker or more absorbent than in other areas of the storage layer. In the preferred two-layer embodiment, in which the storage layer is connected to the conductive layer in the form of the intermediate garment, the storage layer can also have cutouts so that it is present in the aforementioned areas with high perspiration (in particular on the back, underarms and backs of the knees or in the neck area) and not present in other areas of the intermediate garment or is present only in the form of conductive areas.For example, the storage layer can be designed to cover the entire surface in areas with high perspiration, while in other areas it can have holes or "textile bridges" that connect the aforementioned areas to absorb sweat from other areas. This has the advantage that the storage layer provides sufficient moisture absorption, particularly in areas with high perspiration, and reduces the frequency of moisture contact with the outer garment in other areas with low perspiration. The intermediate garment can also have pockets in the aforementioned areas into which storage material, e.g., the material of the storage layer, can be inserted while dry, thus acting as a storage layer (or additional storage layer). This has the additional advantage that moist material from the storage layer can be easily removed or replaced.

[0048] A zipper is preferably covered both inside and out. Alternatively, or in addition, a moisture-proof zipper is available. However, another closure technique can also be used, provided it is water-tight.

[0049] The invention has the advantage of providing a clothing system that prevents or at least reduces the ingress of moisture by humans into a technically clean room. The clothing system can also meet requirements in the area of ESD protection (ESD: "ElectroStatic Discharge"), which is particularly challenging in low humidity manufacturing environments. In particular, the clothing system can meet the following core requirements: High abrasion resistance (so that the clothing does not pose too great a risk of contamination), good to very good filtration efficiency (so that possible contamination emanating from the wearer is retained as best as possible), prevention or reduction of moisture release through perspiration of the wearer, low tendency to charge in order to meet ESD requirements.

[0050] These requirements can be met particularly in combination.

[0051] The invention is explained in more detail below with reference to the accompanying figures using exemplary embodiments. In the various figures, identical components are provided with identical reference numerals. The figures are generally not to scale. They show: Figure 1 a clothing system with a jumpsuit as outerwear and long-sleeved shirt and trousers as intermediate clothing, Figure 2an example of a preferred construction of the clothing system with a two-layer intermediate garment and a single-layer outer garment, Figure 3 outerwear with a conductive connection, Figure 4 a long-sleeved shirt of intermediate clothing with a sensor unit, Figure 5 a block diagram of an embodiment of a method according to the invention.

[0052] Figure 1 shows a clothing system 1 with a jumpsuit 2 as outerwear 2 and a long-sleeved shirt 3a and trousers 3b as intermediate clothing 3. The "assembled" clothing system 1 is shown on the left, and the individual components on the right. The jumpsuit 2 here has a hood 2b, which can be permanently attached to the jumpsuit 2 or can also be present as a separate component. The intermediate clothing 2, which is worn inside the jumpsuit 2, is designed in multiple layers, as shown in Figure 2 is shown.

[0053] The clothing system 1 is suitable for a technically clean space, such as a cleanroom or clean room. The outer clothing 2 is designed to be dustproof for cleanrooms and has a moisture barrier 4 (see Figure 2 ), which blocks the escape of moisture from the inside to the outside. It is also designed to be abrasion-resistant so that no particles can detach from it, and it has elastic cuffs at all openings to prevent particles from escaping from the inside. The intermediate garment 3 has a conductive layer 5 made of synthetic fibers on the inside and a storage layer 6 made of a moisture-absorbing and moisture-storing material on the outside (see Figure 2 ). Outerwear 2 and intermediate garment 3 are designed so that they can be put on and taken off separately.

[0054] Figure 2shows an example of a preferred construction of the clothing system 1 with a two-layer intermediate clothing 3 and a single-layer outer clothing 2 (see e.g. Figure 1 ). On the left is the inner side, which lies against a person's body, either directly on their skin or on their underwear. The arrows show the conductive layer 5, which is directly connected to the storage layer and is intended to transport fluid from the skin to the storage layer 6. It is not necessarily the case that the conductive layer has to ensure a directed transport of moisture. It simply has to ensure that moisture is evenly distributed within it. This can be achieved, for example, with fibers that can be wetted with moisture but do not absorb moisture into their interior. The transport of moisture is then achieved by the storage layer 6, which absorbs the moisture from the conductive layer like a sponge.

[0055] On the right, the moisture barrier 4 is shown, which is not directly connected to the storage layer 6. Rather, there is a gap Z between the moisture barrier 4 and the storage layer 6, as in Figure 1 shown (gap Z between outerwear 2 and intermediate garment 3). Note that outerwear 2 and intermediate garment 3 can certainly touch, so that the gap Z no longer exists there, but the contact should not be extensive, so that the outerwear does not always touch the intermediate garment everywhere. In practice, this is automatically achieved by the fact that outerwear 2 and intermediate garment 3 consist of separate garment parts and a person moves with the clothing system 1.

[0056] Figure 3shows an outer garment 2 with a conductive connection L. Here, the hood 2a is a separate piece of clothing and the conductive connection L establishes an electrical connection between the two arms and the two legs, so that all extremities are short-circuited together.

[0057] Figure 4 shows a long-sleeved shirt 3a of the intermediate garment 3 with a sensor unit 7. This is a resistance meter that measures the resistance between two conductive connections L (e.g., wires) from arm to arm. In a dry textile, the resistance between the conductive connections L is very large and can be assumed to be infinite. It is assumed here that the outer side of the textile is formed by a storage layer 6 (see Figure 2). As humidity increases, the electrical resistance between the conductive connections L decreases, which can be registered by the sensor unit 7. If the resistance is below a predetermined limit, it can be assumed that the clothing system 1 is too damp and should be replaced.

[0058] Figure 5 shows a block diagram of an embodiment of a method according to the invention for working in a technically clean room, e.g. a clean room, with a clothing system 1 according to the invention (see e.g. Figure 1 ).

[0059] In step I, the clothing system 1 with intermediate clothing 3 and outer clothing 2 is put on. The intermediate clothing 3 is two-layered and includes conductive layer 5 and storage layer 6.

[0060] In step II, the work is carried out until the storage layer 6 has reached a predetermined level of humidity. In this example, this is assumed to be when a predetermined period of time has elapsed.

[0061] In step III, the outer clothing 2 is removed. The person still wears the (damp) intermediate clothing 3.

[0062] In step IV, the (damp) intermediate clothing 3 is removed.

[0063] In step V, new intermediate clothing 3 and the old outer clothing 2 are put on.

[0064] Now the work can continue.

[0065] Finally, it should be noted once again that the invention described in detail above merely represents exemplary embodiments that can be modified in a variety of ways by those skilled in the art without departing from the scope of the invention. Furthermore, the use of the indefinite articles "a" or "an" does not exclude the possibility that the respective features may be present in multiple instances. Likewise, terms such as "unit" do not exclude the possibility that the respective components consist of several interacting subcomponents, which may also be spatially distributed. List of reference symbols

[0066] 1Clothing system 2Outerwear / overalls 2aHood 3Intermediate clothing 3aLong-sleeved shirt 3bTrousers 4Moisture barrier 5Conductive layer 6Storage layer 7Sensor unit LConductive connection ZSpace

Claims

1. Clothing system (1) for a technically clean room, comprising outer clothing (2) and intermediate clothing (3) which is intended to be worn beneath the outer clothing (2), wherein - the outer clothing (2) is manufactured in such a way that it is dust-tight for clean rooms and also has a moisture barrier (4) which blocks the escape of moisture from the inside to the outside, - the intermediate clothing (3) has a conductive layer (5) made of synthetic fibers, - at least one storage layer (6) made of a moisture-absorbing and moisture-storing material is located between the moisture barrier (4) and the conductive layer (5), wherein the outer clothing (2) and intermediate clothing (3) are designed in such a way that they can be put on and taken off separately from one another.

2. Clothing system (1) according to claim 1, wherein the intermediate clothing (3) is an at least two-layer textile, the inside of which is formed from the conductive layer (5) which is firmly connected to the storage layer (6), preferably wherein the outer clothing (2) is formed from a polyester fabric which is provided in particular with a moisture-impermeable coating.

3. Clothing system (1) according to one of the preceding claims, wherein the conductive layer (5) and the storage layer (6) are present as knitted fabric, preferably as warp-knitted or knitted fabric, or as woven fabric.

4. Clothing system (1) according to one of the preceding claims, which is designed to be antistatic, wherein the outer clothing (2) and / or the intermediate clothing (3) is electrically conductive, preferably such that there is a conductive connection (L) from arm to arm and / or leg to leg and / or leg to arm, and the surface resistance is preferably between 1 MΩ and 1 GΩ, preferably wherein the conductive connection (L) comprises electrically conductive elements in the form of fibers, wires or electrodes which run through the clothing in question.

5. Clothing system (1) according to one of the preceding claims, wherein the outer clothing (2) is a jumpsuit (2) to which a hood (2a) is preferably attached, or wherein the outer clothing (2) is a combination of a jumpsuit (2) and a separate hood (2a), wherein the hood (2a) encloses the head of the wearer except for a cutout for the face.

6. Clothing system (1) according to one of the preceding claims, wherein the basis weight of the outer clothing (2) is between 80 g / m 2 and 180 g / m 2 lies.

7. Clothing system (1) according to one of the preceding claims, wherein the basis weight of the intermediate clothing (3) is between 100 g / m 2 and 300 g / m 2 and the weight proportion of the conductive layer (5) is preferably greater than 20% and wherein the storage layer (6) is heavier than the conductive layer (5), preferably more than twice as heavy.

8. Clothing system (1) according to one of the preceding claims, wherein the minimum water vapor transmission resistance R et outerwear (2) 2 m 2 Pa / W is preferably 3.5 m 2 ·Pa / W.

9. Clothing system (1) according to one of the preceding claims, wherein the intermediate clothing (3) is a jumpsuit (2) or a combination of a long-sleeved shirt (3a) and trousers (3b) with long legs, preferably wherein the material of the outer side comprises cotton, viscose or modal.

10. Clothing system (1) according to one of the preceding claims, wherein the clothing system (1), preferably on the storage layer (6), has a sensor unit (7) which is able to measure the moisture inside the outer clothing, in particular on the storage layer (6), and in the event that the moisture exceeds a predetermined limit, preferably to issue an alarm to the wearer of the clothing system (1), preferably wherein the storage layer (6), preferably the intermediate clothing (3), is designed to be antistatic by means of electrically separated elements in the form of fibers, wires or electrodes and a resistance between the electrically separated elements is measured as a measure of the moisture.

11. Clothing system (1) according to one of the preceding claims, wherein the clothing system (1) has a further layer between the moisture barrier (4) and the storage layer (6), preferably a further conductive layer (5), which is preferably designed such that moisture is conducted from the moisture barrier to the storage layer (6).

12. Clothing system (1) according to one of the preceding claims, wherein the moisture barrier (4) has a water-repellent coating and / or the conductive layer (5) has a moisture-conducting coating and / or the storage layer (6) has a water-absorbing coating.

13. Clothing system (1) according to one of the preceding claims, wherein the storage layer (6) in predetermined areas where a high amount of perspiration is to be expected, in particular on the back, on the armpits and backs of the knees, on the forearms, the wrists, on the buttocks, the thighs and / or in the neck area - is thicker than in others, preferably more than 1.5 times thicker, and / or - is present over the entire surface and has recesses in other areas, and / or - is present in pockets of the intermediate clothing.

14. A method for working in a technically clean room with a clothing system (1) according to one of the preceding claims, comprising the steps: a) putting on the clothing system (1) with intermediate clothing (3) and outer clothing (2), b) carrying out the work until the storage layer (6) has reached a predetermined degree of moisture, which is preferably determined by means of a sensor unit (7), or until a predetermined period of time has elapsed, c) taking off the outer clothing (2), d) taking off at least the storage layer (6), preferably the intermediate clothing (3), e) putting on a new storage layer (6), preferably a new intermediate clothing (3), and one / the outer clothing (2), f) repeating steps b) to e), wherein the outer clothing (2) is preferably not changed.

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