AT521764A1 - Flame protection hood - Google Patents

Abstract

The invention relates to a flame protection hood with at least one outer support layer (5) and at least one inner support layer (7), a filter layer (6) for filtering particles from the air being arranged between the outer support layer (5) and the inner support layer (7) is. The object of the invention is to provide a flame protection hood which enables the shortest possible preparation time with good protection of the wearer. This is achieved in that the filter layer (6) has at least two interconnected filter cut parts (6a, 6b) which are sewn together at least partially via at least one filter seam (6c) and that the connection of the filter cut parts (6a, 6b) is at least partially sealed is.

Description

The invention relates to a flame protection hood with at least one outer carrier layer and at least one inner carrier layer, a filter layer for filtering pollutants from the air being arranged between the outer carrier layer and the inner carrier layer.

Flame protection hoods are mainly used to protect the wearer - mostly firefighters and firefighters - from the effects of heat and fire. They are used particularly in fire brigade operations where respiratory protection is worn.

The outer and inner backing layers are usually made of a soft and stretchable fiber such as fire-resistant textile fibers (e.g. Kevlar or aramide) or other fabrics and at least partially take on the task of thermal insulation.

Since contact with potentially harmful pollutants such as fine particles and other substances can often not be avoided in such applications, flame protection hoods are known which have filter layers. These prevent the penetration of the substances, which usually have fine particles in sizes in the mm and pm range, and contact with the skin of the wearer. These filter layers are usually less elastic than the carrier layers.

The disadvantage of such flame protection hoods is that the poor elasticity of the filter layer means that they cannot be cut tightly and therefore sit poorly on the support. In the neck area in particular, there are large voids between the neck of the wearer and the neck area. On the one hand, this means that it is not very comfortable to wear and, on the other hand, it means that the flame protection hood can slip easily, making it more difficult to put on additional clothing. This means that the necessary preparation time for firefighters is extended until they are ready for an assignment. As most of the missions are acute emergencies, the shortest possible preparation time is a high priority.

In addition, the layers can shift against each other when the hood is tightened, reducing the protective effect and lengthy organization

2/26 and sorting the layers. The filter layer is therefore often sewn or quilted with at least one carrier layer, so that a stable connection between the carrier layer and the filter layer is possible. However, this requires openings in the filter layer, in particular when stretching the seams, through which otherwise filtered particles can pass the filter layer.

The object of the invention is therefore to provide a flame protection hood which enables the shortest possible preparation time with good protection of the wearer.

This object is achieved according to the invention in that the filter layer has at least two interconnected filter cut parts, which are sewn together at least partially via at least one filter seam, and in that the connection of the filter cut parts is at least partially sealed.

By dividing it into several filter cut parts, the shape of the less elastic membrane can be better adapted to the complex three-dimensional shape of the flame protection hood. The resulting perforations or openings in the membrane, however, result in the risk of penetration of harmful substances and particles. However, this can be prevented by the seal, as a result of which the filter layer remains intact and its filter function is not reduced. The entire connection of the filter cut parts is preferably sealed.

Sealing means that no substances can pass through the connection that cannot pass through a continuous part of the membrane. The seal on substances that can otherwise pass through continuous parts of the membrane can hinder the passage.

The filter layer can be made, for example, of microporous PTFE (polytetrafluoroethylene), polyester or PU (polyurethane).

If it is provided that the filter layer has at least two filter cut parts which are sewn together at least partially via at least one filter seam, the shape of the filter layer can be optimally adapted to the shape of the head and upper body of the wearer. The manufacturing process is also made easier because flat filter cut parts can be cut and sewn together afterwards.

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It is advantageous if the connection of the filter cut parts is at least partially sealed. This prevents the undesired floating of particles through the connection. The seal should be at least so tight that only particles or substances of that size or type can pass through that can also pass through continuous parts of the filter layer. The sealing can be carried out with the same material from which the filter layer essentially consists.

For this purpose it can be provided that an adhesive tape seals the connection of the filter cut parts, which is preferably welded to the filter cut parts. The adhesive side of the adhesive tape can be fixed to the filter cut parts and then welded to them, for example by hot air welding or ultrasonic welding.

It is also particularly advantageous if the filter seam is at least partially sealed. Sealing the seam minimizes the risk that holes in the backing layer are torn through the seam, through which particles can undesirably pass.

Accordingly, it is particularly advantageous if an adhesive tape is arranged on the filter seam of the filter layer, which is preferably welded to the filter layer. This allows the seam to be made first and then the sealing tape to be placed on it. This also allows larger holes to be closed by sewing. If the adhesive tape is made of the same material as the filter layer parts, it can bond permanently and well to the filter layer parts.

It is particularly advantageous if the filter layer has at least one seam flag, which is connected to at least one carrier layer. This enables a dense filter layer, but a stable connection between the layers. This prevents unwanted shifts between the layers. The filter layer no longer has to be connected to the carrier layers via seams penetrating the filter layer. The connection via the seam flag is more flexible and adapts more easily to deformations of the flame protection hood, for example when pulled over the head, but still enables a stable connection without unwanted folds or wrinkles. The filter layer can still have penetrating seams

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Support layers are connected, especially at end areas such as a face hole, this is not a problem.

It can be provided that at least the outer carrier layer is connected to the seam flag.

It is particularly advantageous if the filter layer parts are sewn overlapping on the filter seam and at least one filter layer part at least partially forms the seam flag. As a result, the seam flag is automatically provided at least partially by sewing. Alternatively, the seam flag can also be formed by a further piece of fabric, which is sewn together with the filter layer parts. The seam flag formed by the filter layer part can also be extended by additional pieces of fabric. Alternatively, the seam flag can also be formed by sewing a loop of the filter layer.

In order to achieve a particularly flexible connection, the seam flag can be sewn to at least one carrier seam flag of a carrier layer.

If the adhesive tape is arranged on the filter layer, on the one hand it is not visible and on the other hand it is protected against external influences and damage.

Furthermore, it can be provided that an annular collar region of the flame protection hood has at least one elastic traction region which extends essentially along the circumference of the collar region. The arrangement of the pulling area allows the circumference of the collar area to adapt to the neck thickness of the wearer as soon as the flame protection hood has been pulled over the wearer's head. The circumference of the collar area is preferably chosen to be large enough that the head, which is generally larger in circumference than the neck, fits well through the collar area when the tension area is tensioned. As soon as the collar area sits on the neck, the pull area contracts so that the collar area fits comfortably to the neck circumference. This reduces or prevents air pockets between the neck and the collar area. This also reduces the risk of slipping when fully tightened.

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The pulling area is an area which brings the collar area into a contracted shape in a relaxed position, but allows the collar area to be enlarged elastically when tensioned.

It can be provided that the outer carrier layer has a smaller cut than the filter layer in the unloaded state, at least in the collar area. The different cuts ensure that the filter layer in the collar area between the seams with which it is connected to the outer carrier layer is larger than the collar region of the outer carrier layer. The circumference of the filter layer in the collar area is therefore larger than the circumference of the outer carrier layer in the collar area. In the event of a relief, this means that the outer carrier layer contracts elastically to such an extent that it assumes a relieved state. The filter layer arranged therein folds.

It is advantageous if the elastic traction area has at least one elastic band, which is connected at least to the outer carrier layer. Alternatively, it can also be provided that the elastic traction area has at least one elastic band, which is connected at least to the inner carrier layer. The elastic band can be arranged so that in a relaxed position it not only brings the filter layer but also at least one carrier layer into a folded position. The elastic band means an elastic band which has a certain length in the relaxed position and can be brought apart by pulling it into a tensioned position in which its length is greater.

These flame protection hoods usually have a head area, a collar area and an upper body area, which are arranged on the head, neck or upper body of the wearer when worn as intended.

Furthermore, it can be provided that a pulling area is arranged on each side surface and a pulling area on a neck surface, the pulling areas being arranged essentially at the same height. This ensures that the collar area folds evenly, which is comfortable. The height relates to the height along a main axis of the flame protection hood, along which the head region, the collar region and the upper body region are arranged.

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It is particularly advantageous if all pull areas are designed together to reduce the circumference of the collar area from a fully tensioned position of the pull areas to a relaxed position by at least 30%. If only one pull area is provided, it is accordingly advantageous if this pull area alone enables a reduction of 30%.

In the case of fires, tiny particles often arise, which pose a health risk. So these suspended matter can be carcinogenic in the air. Accordingly, in a preferred embodiment, the maximum passage size of the filter layer for particles is at least 2 μm. This can minimize the health risk for the wearer, but still provide a breathable hood.

It is particularly advantageous if the filter layer is designed to prevent the passage of polycyclic aromatic hydrocarbons. This means that these toxic substances can no longer get to the skin of the wearer of the flame protection hood.

It is particularly advantageous if a back area of the flame protection hood, which is arranged in the intended state in the area of the back of the head, is free of the filter layer. Thus, when the flame protection hood is put on as intended, the area of the back of the head is arranged in the area of the wearer's parietal bone, that is to say in the cranial-dorsal area of the head, above the parietal lobe of the brain. Since this area is usually covered by the protective helmet during operations, the particle load there is limited to a minimum. Accordingly, the arrangement of the filter layer is not necessary, but the omission of the filter layer makes this area more elastic. This means that the flame protection hood sits better without significantly increasing the particle load on the wearer. At the same time, the relatively cost-intensive filter layer is saved, which leads to cheaper production.

The present invention is explained in more detail below on the basis of the non-restrictive embodiment variants shown in the figures. Show it:

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Figure 1 shows a first embodiment of a flame protection hood according to the invention in a front view.

2 shows the first embodiment in a side view;

3 shows the first embodiment in a rear view;

4 shows a second embodiment of a flame protection hood according to the invention in a side view;

5 shows the second embodiment in a rear view;

6 shows a schematic illustration of a sealed seam in a first embodiment in a section;

Fig. 7 is a schematic representation of a sealed seam in a second embodiment in a section.

1 to 3 show a first embodiment of a flame protection hood which has a head region 1, an adjoining collar region 2 and an upper body region 3 adjoining the collar region 2. It is shown in the figures in an intended use position which it assumes when it is attracted to the wearer. The head of the wearer is accordingly arranged in the interior of the head region 1, and its face protrudes through a face opening 11 of the head region 1. The collar area 2 is arranged at the level of the neck of the wearer, while the upper body area 3 essentially covers the upper parts of the shoulder-upper body area of the wearer. The carrier is not shown.

The upper body region 3 is saddle-shaped and has cutouts for the shoulders of the wearer, as well as a breast bib 31 and a back bib 32, which are arranged on the breast or on the back of the carrier. The flame protection hood is preferably put on first and then a protective jacket. The protective jacket at least partially covers the upper body area 3, so that the neck and upper body area are jointly protected from potentially dangerous particles by the protective jacket and the flame protection hood.

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The collar area 2 is essentially shaped as a hollow cylinder, an elastic pulling area 4 being arranged approximately at a medium height on the sides, ie above the shoulders of the wearer, and on the rear side, ie in the neck of the wearer.

If the flame protection hood is pulled over the head of the wearer, the circumference of the collar area 2 first widens and the pull areas 4 go into a tensioned position and expand. If the collar area 2 sits at the level of the neck of the wearer after being pulled down further, the pull areas 4 adapt to the reduced circumference of the neck and go into a more relaxed position.

The embodiment shown has a three-layer structure. In this case, an outer carrier layer 5 faces the environment, while an inner carrier layer 7 faces the carrier. A filter layer 6 is arranged in between, which is permeable to gases and particles with a size of less than 2 μm. The inner carrier layer 7 and the filter layer 6 extend essentially over the entire outer carrier layer 5. The filter layer 6 is a filtering membrane with a porous structure, whereby essentially no particles, but air and other small-molecule gases can pass through the membrane. The filter layer 6 is designed to filter out polycyclic aromatic hydrocarbons (PAHs) and to protect the user of the flame protection hood from them. This enables the wearer to be protected against harmful substances, but at the same time the flame protection hood remains breathable.

Each traction area 4 has two elastic bands 41 arranged one above the other. These elastic bands 41 are sewn to an outer carrier layer 5 in such a way that, in a relaxed position, that is to say as shown in the figures, they pull together the circumference of the collar region 2 of the outer carrier layer 5. By arranging the tension areas 4 at substantially the same height, a uniform reduction in the circumference of the collar area 2 on the sides and in the rear area of the flame protection hood is achieved, while the area in front of the wearer's throat remains essentially unfolded. They are arranged on the inside, ie on the side of the outer carrier layer 5 facing the filter layer 6.

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The first embodiment has 3 edge seams at the end regions, that is to say at the face opening 11 and at the lower end of the breast region, which connect the inner carrier layer 7, outer carrier layer 5 and filter layer 6 to one another. The carrier layer 5 is at least partially pierced, which leads to a particularly stable connection. However, it does not damage the filter property of the filter layer 6, since the edge areas are not completely sealed anyway due to the openings.

The outer carrier layer 5 is composed of a total of five filter cut parts, which can be individually cut well from fabric and are sewn to one another via connecting seams 22. If they are sewn together, the three-dimensional shape results, which is adapted to the body of the wearer. The filter layer 6 or the inner carrier layer 7 can also be implemented in the same or similar manner.

The embodiment shown in FIGS. 4 and 5 is very similar to the first embodiment, so only the most important differences are dealt with here.

As in the first embodiment, the filter layer 6 extends over the inner surface of the outer carrier layer 5, but it is recessed in a back area 12, that is to say it is free of the filter layer 6. For this purpose, the filter layer 6 is designed such that it has a round opening 13 trained in the back of the head 12. It is designed in such a way that in the intended, tightened position on the head it extends approximately from the top of the head, that is from the uppermost point of the wearer's head, to approximately the border of the parietal bone and occiput. Accordingly, the opening 13 lies approximately above the parietal bone.

The second embodiment does not have an upper body region 3, but ends after the collar region 2. Thus, the pull regions 4 are arranged in the region of a neck opening 20. As a result, the flame protection hood can be arranged above a protective jacket 21, which is correspondingly put on and closed in front of the flame protection hood. The tension elements 4 thus seal the connection between the collar area of the protective jacket 21 and the collar area 2 of the flame protection hood through the tension areas 4, so that no particles can penetrate through the neck opening 20.

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6 shows a first embodiment of a seam connection in detail. The filter layer 6 has a first filter cut part 6a and a second filter cut part 6b, which protrude from one another in the region of their edges and are connected there via a filter seam 6c. The area of the filter seam 6c and the transition area between the filter cut parts 6a, 6b is covered with an adhesive tape 14 designed as an adhesive strip. The adhesive tape 14 is welded to the filter cut parts 6a, 6b, with which the filter seam 6c is sealed. The majority of the filter cut parts 6a, 6b thus together form a continuous, filtering barrier between the inner and outer carrier layers 5, 7, through which no particles of more than 2 μm can pass.

The filter seam 6c is arranged near the end of the second filter cut part 6b, with which the first filter cut part 6a forms a seam flag 15 between its end and the filter seam 6c. This seam flag 15 is not part of the filtering barrier, as a result of which the perforation does not result in undesired through openings for particles.

The outer carrier layer 5 also has a first outer cut part 5a and a second outer cut part 5b, these protruding at their edges. The area of the projection is essentially at the level of the seam flag 15 or the filter seam 6c. In the area of the protrusion, the outer cut parts 5a, 5b are also sewn to one another via an outer seam 16, the outer seam 16 also being sewn to the seam lug 15. This enables a flexible but nevertheless stable connection that does not open the filtering barrier. A seam can also be provided, which only connects the outer carrier layer 5 to the seam lug 15, regardless of an outer seam connecting the outer cut parts 5a, 5b

16.

The inner carrier layer 7 also has a first inner cut part 7a and a second inner cut part 7b, which are arranged overlapping in the region of the edges and sewn together. The area of the overlap is offset from the filter seam 6c.

7 shows a second embodiment of a seam connection, the filter seam 6c being so far away from the edges of the first and second filter cut parts 6a, 6b that a seam flag 15 is formed by both a part of the first and second filter cut parts 6a, 6b becomes. They are the seam flag 15

11/26 forming parts of the first and second filter cut part 6a, 6b approximately the same length. The adhesive tape 14 is not arranged directly above the filter seam 6c, but only covers a gap 17 which arises in the transition region of the filter cut parts 6a, 6b.

The outer cut parts 5a, 5b are arranged similarly to the filter cut parts 6a, 6b, so that the parts of the outer cut parts 5a, 5b projecting beyond the outer seam 16 form a carrier seam lug 19 which is connected to the seam lug 15 via a connecting seam 18.

The seam that connects the first inner cut part 7a and the second inner cut part 7b is arranged at the level of the seam tab 15.

Claims (18)

1. Flame protection hood with at least one outer carrier layer (5) and at least one inner carrier layer (7), a filter layer (6) for filtering pollutants from the air being arranged between the outer carrier layer (5) and the inner carrier layer (7), characterized in that the filter layer (6) has at least two interconnected filter cut parts (6a, 6b) which are at least partially sewn together via at least one filter seam (6c) and that the connection of the filter cut parts (6a, 6b) is at least partially sealed. 2. Flame protection hood according to claim 1, characterized in that an adhesive tape (14) seals the connection of the filter cut parts (6a, 6b). 3. Flame protection hood according to claim 2, characterized in that the adhesive tape (14) is welded to the filter cut parts (6a, 6b). 4. Flame protection hood according to one of claims 1 to 3, characterized in that the filter seam (6c) is at least partially sealed. 5. Flame protection hood according to claim 4, characterized in that an adhesive tape (14) on the filter seam (6c) of the filter layer (6) is arranged, which is preferably welded to the filter layer (6). 6. Flame protection hood according to one of claims 1 to 6, characterized in that the filter layer (6) has at least one seam lug (15) which is connected to at least one carrier layer (5, 7). 7. Flame protection hood according to claim 6, characterized in that at least the outer carrier layer (5) is connected to the seam flag (15). 8. Flame protection hood according to one of claims 1 to 7, characterized in that the filter layer parts (6a, 6b) are sewn overlapping on the filter seam (6c) and at least one filter layer part (6a, 6b) at least partially forms the seam flag (15). 13/26 9. Flame protection hood according to one of claims 1 to 8, characterized in that the seam flag (15) with at least one carrier seam flag (19) is sewn to a carrier layer (5). 10. Flame protection hood according to one of claims 1 to 9, characterized in that an annular collar region (2) of the flame protection hood has at least one elastic pull region (4) which extends essentially along the circumference of the collar region (2). 11. Flame protection hood according to one of claims 1 to 10, characterized in that the outer carrier layer (5) at least in the collar region (2) has a smaller blank than the filter layer (6) in the unloaded state. 12. Flame protection hood according to claim 10 or 11, characterized in that the elastic traction region (4) has at least one elastic band (41) which is connected at least to the outer carrier layer (5). 13. Flame protection hood according to one of claims 10 to 12, characterized in that the elastic traction region (4) has at least one elastic band which is connected at least to the inner carrier layer (7) 14. Flame protection hood according to one of claims 1 to 13, characterized in that the flame protection hood has at least one head region (1), a collar region (2) and an upper body region (3). 15. Flame protection hood according to one of claims 10 to 14, characterized in that a pulling area (4) is arranged on each side surface and a pulling area (4) on a neck surface, the pulling areas (4) being arranged essentially at the same height . 16. Flame protection hood according to one of claims 10 to 15, characterized in that all pull areas (4) are designed together to extend the circumference of the collar area (2) from a fully tensioned position of the pull areas (4) to a relaxed position by at least 30%. to reduce. 14/26 17. Flame protection hood according to one of claims 1 to 16, characterized in that the filter layer (2) is designed to prevent the passage of polycyclic aromatic hydrocarbons. 18. Flame protection hood according to one of claims 1 to 17, characterized in that a back area (12) of the flame protection hood, which is arranged in the intended condition in the area of the back of the head, is free of the filter layer (6).