DE102011013064A1 - Retaining loop, particularly fixed loop for vehicles, has retaining strap belt and retaining strap closure area, where retaining strap belt is reinforced over fabric band - Google Patents

Abstract

The retaining loop has a retaining strap belt (11) and a retaining strap closure area. The retaining strap belt is reinforced over a fabric band (12). The retaining strap is formed in the fabric band surrounding area on the basis of a metallocene catalyzed polyethylene plastic (14). A design lug covers over a wear point in the retaining strap closure area. An independent claim is also included for a method for manufacturing a retaining strap, particularly fixed strap for vehicles.

Description

The invention relates to a retaining loop, in particular retaining loop for vehicles, with a reinforced over at least one fabric tape, flexible retaining strap and a strap loop area. The invention also relates to a method for producing such a retaining loop.

• a. PVC-Gewebeband-Halteschlaufen
• b. Mit Gurt befestigte Kunststoffgriffe
• c. Reine Kunststoffhalteschlaufen

There are known from practice or from the prior art various straps. According to the current state of the art is the plastic from which these straps are made, either health concern (in heat, such as a fire, emit toxic gases from the PVC), but then has a very good functionality. The alternatively used plastic (eg ABS, PP or ETPM) for straps is less harmful to health, but is then also significantly limited in its functionality and even disadvantageous (eg bad feel, slipping or less tensile strength). For the current state of the art, in particular the following three, most widespread variants can be distinguished:

• a. PVC fabric band straps
• b. Belt-mounted plastic handles
• c. Pure plastic straps

The following briefly describes the advantages and disadvantages of the individual variants:

a. PVC fabric band straps

Currently the most widely used straps in public transport are loops made of a combination of PVC and polyester fabric tape. The fabric tape is made of an extremely tear-resistant fabric, similar to a safety belt, as used in cars. This fabric band forms the core of the strap and is mainly responsible for the tear strength and stability of the loop. There is a PVC sheathing around the fabric band. This sheath ensures in particular for a pleasant, non-slip and non-cutting feel. Fabric tape and PVC sheath are initially not firmly connected. The process works in the production so that first a PVC hose is extruded and then the fabric tape is inserted into the cooled hose. Subsequently, pieces are cut according to the size of the desired retaining loop. These are folded into a loop, punched at the junction and then connected by means of a zinc die-cast bucket firmly to a loop. Regarding this strap is on the DE 10 2008 056 732 A1 directed. PVC fabric strap loops are characterized by the following properties:

Advantages:

• 1. Due to the fabric tape core, the straps are extremely stable and easily withstand a load of over 250 N.
• 2. Due to the robust but at the same time soft PVC on the outside, the loops get a grippy and pleasant feel. If, for example, one were to use a fabric band alone, this would lead to an unpleasant incision in the hand or forearm under heavy load or lasting hold.
• 3. Thanks to its grip, the PVC sheathing also ensures that the loops can be moved relatively easily along the mounting rod if necessary. But if, for example, by strong, sudden braking to a passenger pulls jerky to hold on to slip the PVC-coated loops not along the rod, but provide the desired grip.
• 4. Due to the zinc die-cast small pieces the straps are very easy to retrofit. They are placed around the mounted bar and closed with bucks. Disassembly of the mounting rod is not necessary.

Disadvantage:

• 1. The incineration of PVC produces a number of toxic gases which pose an increased safety risk in public transport. When incinerating PVC (eg due to a bus accident or vandalism): a. Gaseous hydrogen chloride, which forms hydrochloric acid in combination with water or humidity. This has two effects: i. Hydrochloric acid is a respiratory poison and leads to strong chemical burns when inhaled. A well-known example of this has been the fire at Düsseldorf Airport in 1996, where PVC sheathing of cables has favored the rapid spread of fire as well as highly toxic and corrosive smoke. ii. In waste incineration plants, the corrosive hydrochloric acid causes the plants to corrode more quickly. b. The result is highly toxic dioxins (eg Seveso poison). Depending on their chemical structure dioxins provide different clinical pictures. As a possible sequelae disease example is here to call the chloracne. c. The incineration of PVC is incomplete and strongly soot-forming. The resulting smoke contains as a result polycondensed aromatics (eg. Benz (a) -pyrene), which are highly toxic and carcinogenic.
• 2. PVC is an undesirable substance due to health concerns. Since pure PVC is hard and brittle in its basic form and the retaining loop needs a flexible and elastic structure, it is necessary to add softening agent to the PVC, which then constantly migrates out of the fabric (eg on contact with water or perspiration) Plasticizer involves the following disadvantages: a. Plasticizers can enter the human body via skin contact or the respiratory tract and have many detrimental effects on health. The proven negative effects are listed below: i. The commonly used phthalate softeners are damaging to the liver and kidneys.  ii. Phthalate plasticizers are suspected of being carcinogenic. iii. Plasticizers interfere with the hormonal balance of humans and are therefore considered harmful to fertility. b. In the case of improper handling and machine defects, for example, there is an increased risk that harmful plasticizer vapors may be released and absorbed through the respiratory tract. Thus, especially the employees are exposed to a significantly increased health risk. c. During the processing (eg cleaning of the equipment or disposal of contaminated machine parts) or the disposal of PVC in landfills, plasticizers can reach the groundwater. They are extremely stable and remain in the long-term leachate or serve by re-evaporation (increased temperature on landfills by solar radiation and chemical decomposition processes) as a source of gas pollution. Thus, PVC is not landfillable and must be disposed of separately.
• 3. PVC fabric strap straps are not disinfectant and therefore represent a high risk of infection, especially as a result of the short and frequent contacts with a wide variety of healthy or sick people.
• 4. Due to the volatility of the plasticizer loops lose their elasticity in the long term and are increasingly brittle and unstable.
• 5. The biggest weakness in the area of tear strength is the perforation of the loop on the block. Tests have shown that a tearing of the strap, in most cases exactly at this point happens.
• At the same time, the bucket for closing the loop is inevitable according to the current state of the art.
• 6. PVC is rather poorly recyclable due to its temperature sensitivity, the recovery rate is only 70%. It also comes downcycling, d. h., it is only recovered inferior quality PVC.
• 7. Since fabric tape and PVC are not firmly joined together, it sometimes happens that the fabric tape twists within the PVC. This has in particular two consequences:  a. The bumps and knots deteriorate the feel of the wrist strap. For example, pressure points can arise. b. Due to the unequal loads, the PVC wears unevenly and thus more quickly at the heavily loaded areas.
• 8. There are no luminescent variants of these straps to the present state of the art.

b. Belt-mounted plastic handles

The second widely used variant for handholds in buses and trains are handles made of hard plastic (usually made of ABS), which are fastened by means of a belt-like polyester fabric tape on the rods provided in the bus. Since the polyester of the fabric tape slides very easily along the mounting bar, such handles must be fixed by means of a position stopper at one point of the rod and accordingly can no longer be moved by the passengers in another for the current passenger situation possibly more advantageous position. Such holding systems have the following properties:

Advantages:

• 1. Just like the PVC fabric strap straps, plastic straps attached to the belt are very sturdy due to the extremely sturdy polyester fabric strap and also withstand a load of about 250 N.
• 2. The highly toxic gases that are produced when burning PVC are avoided. Therefore, they are both fire safety and safety less worrying.
• 3. Retrofitting such handles is relatively easy without disassembly of the mounting rod possible, since the polyester tape can be placed around the pole and riveted in place.

Disadvantage:

• 1. Due to the slight slippage of the polyester tape, the handles must be fixed by means of position stoppers and thus can not be easily adapted to the current passenger needs.
• 2. The hard plastic handle often depends on head height and leads to an increased risk of injury the passengers. For this reason, this variant is avoided by many bus operators.
• 3. The openly recognizable fabric tape is more often a target for vandalism (cutting the tape) than is the case with the PVC-wrapped straps.
• 4. The ABS plastic has a hard, stiff and therefore less pleasant feel.
• 5. The ABS plastic is hard and less grippy and therefore more likely to slip off when braking harder.
• 6. There are no handles with disinfecting function.
• 7. According to the current state of the art, no luminescent plastic handles are offered.

c. Pure plastic straps

The third variant of straps in buses and trains is a low-cost alternative, which is mainly used in Asia. These are loops that visually resemble the PVC fabric tape straps, but consist exclusively of a plastic (eg PP or ETPM). Accordingly, these loops contain no stabilizing fabric tape. Another difference is that these straps are usually not connected with a bucket, but are welded from the factory and before installation.

Advantages:

• 1. Pure plastic straps are very cheap to produce and purchase.
• 2. The highly toxic gases that are produced when burning PVC are avoided. Therefore, you are brand-safety and safety less worrying.

Disadvantage:

• 1. Since the plastic loops are not combined with a tear-resistant fabric tape, they are only up to 100-150 N loadable. As a result, they can break faster when subjected to higher tensile loads and pose a safety risk.
• 2. Also, due to the absence of the fabric tape, dimensional changes (i .e. Elongation due to tensile loading) of the loop may be exacerbated. In PVC straps this Zugenergie is largely supported by the non-expanding fabric tape. These dimensional changes have the following disadvantages: a. With jerky strains, it comes to ugly, white spots. b. The material stability and tear resistance is greatly impaired over time. The result is an approximately 30% shorter life of such products. This affects both the maintenance costs as well as the passenger safety. c. With slow lengths over time, there are no visual signs of length. Thus, it can not be recognized how much the material of the retaining strap has already been affected and thus the optimal replacement time is very difficult to determine. If unstable straps remain in the buses for too long, this in turn leads to an increased passenger risk.
• 3. The haptics of the plastic is disadvantageous in comparison to the PVC and leads rather to a cutting of the loops in hand and forearm.
• 4. The plastic used is less grip and non-slip, as is the case with the PVC loops. That is, during heavy braking and tensile load, the loop can slip along the mounting rod and thus no longer provides the required support for the passenger.
• 5. Since these loops are welded directly from the factory for cost savings, retrofitting or replacement of existing loops is only possible with prior disassembly of the mounting rods.
• 6. There is currently no pure plastic loop on the market, which has a disinfecting effect.
• 7. There is currently no luminescent plastic loop on the market.

Overall, the following can be stated:
According to the current state of the art, there are three variants of such straps. First, functionally excellent straps that are, however, contain PVC and thus have significant disadvantages in the field of risk prevention in accidents or affect the health. Second, with belt-mounted handles that on the one hand mean increased risk of injury and on the other hand can not be flexibly adapted to the passenger situation. And third, pure plastic loops, which are only moderately resilient and thus an increased security risk. It is desirable for the first time to solve this contradiction between optimal functionality and freedom from PVC in a retaining loop while at the same time expanding and improving its functional properties.

Based on these known straps and methods for their preparation, the invention is based on the object to improve the known solutions while maintaining the previous advantages in the way or further develop that the disadvantages of the known embodiments are avoided, in particular the contradiction between optimal functionality and freedom from PVC to be solved for the first time in a wrist strap and at the same time their Functional properties should be extended and improved. The desired arrangement should also be easy and inexpensive to produce.

• 1. Wie bereits beschrieben, verbindet mkP die positiven Eigenschaften von PVC (Griffigkeit, angenehme Haptik, geringe Shorehärte) ohne dabei die negativen Verbrennungseigenschaften (insbesondere die Entstehung stark toxischer Gase bspw. bei einem Schwelbrand) zu besitzen.
• 2. Ein weiterer Vorteil des mkP ist die gesundheitliche Unbedenklichkeit des Kunststoffes, der Lebensmittelechtheit besitzt. Dies bedingt auch, das bspw. Bakterien kaum Möglichkeiten finden sich anzulagern.
• 3. Darüber hinaus ist mkP im Gegensatz zu PVC auch im Grundzustand ein eher weicher Stoff und es kann daher auf die Zugabe von stark gesundheitsschädlichen Weichmachern verzichtet werden. Es kommt somit zu keiner Migration giftiger Zusatzstoffe.
• 4. MkP ist widerstandfähig gegen aggressive Substanzen wie bspw. Reiniger oder Handschweiß.
• 5. MkP hat in seiner Grundform thermoplastische Eigenschaften, d. h. es ist schmelzbar und es ist somit zu erwarten, dass es im Rahmen der Extrusion gut mit dem Gewebeband verbunden werden kann.
• 6. MkP kann mittels Elektronenbeschusses nachträglich vernetzt werden und erhält somit elastomere Eigenschaften. D. h., nach einer Dehnung geht der Stoff wieder zurück in seine Ausgangsform. Dies ist insbesondere vorteilhaft, um die beschriebene Längung und somit qualitative Beeinträchtigung durch Zugkräfte zu minimieren.

The object is achieved in terms of the retaining loop according to the invention that the retaining loop is formed in the region surrounding the fabric band substantially on the basis of a metallocene-catalyzed polyethylene plastic. The development of this PVC-free wrist strap solves the contradiction between PVC freedom and optimal properties for the first time with simple means. Approach to this is the development of this novel strap on the basis of a metallocene-catalyzed polyethylene plastic, which has the largely positive properties of PVC (grip, pleasant feel, low Shore hardness) without the negative combustion properties (in particular the formation of highly toxic gases, for example Smoldering fire). Metallocene-catalyzed polyethylene (hereafter mkP) is a material not yet used in profile extrusion. The selection of mkP as a PVC replacement was made on the basis of the many positive properties listed below:

• 1. As already described, mkP combines the positive properties of PVC (grip, pleasant feel, low Shore hardness) without having the negative combustion properties (in particular the formation of highly toxic gases, for example, in a smoldering fire).
• 2. Another advantage of the mkP is the health safety of the plastic, which has food authenticity. This also requires, for example, bacteria hardly opportunities to accumulate.
• 3. In addition, unlike PVC, mkP is also a rather soft substance in the ground state and therefore the addition of highly harmful plasticizers can be dispensed with. There is thus no migration of toxic additives.
• 4. MkP is resistant to aggressive substances such as cleaners or hand perspiration.
• 5. MkP has in its basic form thermoplastic properties, ie it is meltable and thus it can be expected that it can be well connected to the fabric tape in the context of extrusion.
• 6. MkP can be subsequently crosslinked by electron bombardment and thus obtains elastomeric properties. That is, after stretching, the fabric returns to its original shape. This is particularly advantageous in order to minimize the described elongation and thus qualitative impairment by tensile forces.

• a. Der verwendete MkP-unststoff ist lebensmittelecht und bietet daher Bakterien eine sehr schlechte Lebensumgebung. Eine Anhaftung von Bakterien ist unwahrscheinlich.
• b. Durch die Einbringung von Silbernitrationen wird darüber hinaus eine bakterizide Umgebung geschaffen, die Bakterien abtötet.

In the preferred embodiment of the present invention, the retaining loop is self-disinfecting, optionally formed by additionally embedded silver nitrations. This self-disinfecting property is achieved through two innovations:

• a. The MkP plastic used is food safe and therefore provides bacteria with a very poor living environment. An adhesion of bacteria is unlikely.
• b. The introduction of silver titrations also creates a bactericidal environment that kills bacteria.

According to a further feature of the present invention it is provided that the retaining loop has noctilucent pigments. The strap will therefore be easily recognizable even in the dark (eg when driving at night). Thus, it offers a higher level of safety, since now in the dark in a surprising maneuver the handrails are clearly visible and thus can be taken easier and faster.

It is recommended according to a further feature of the present invention that the retaining loop by subsequent crosslinking, in particular by electron bombardment, has generated elastomeric properties. By this subsequent networking of the strap z. B. by electron bombardment, the plastic is given by these elastomeric properties a higher stability, which z. B. also to a reduction of maintenance costs z. B. can lead to the railway operator.

It is expedient, according to a further feature of the present invention, that the retaining strap fire-retardant additives, in particular phosphate-based, so that the strict fire safety standards for commercial vehicles / passenger transport can be met.

According to a further feature of the present invention, it is provided that the retaining loop is formed in the holding loop closure region welded in the region of the fabric tape. In this case, in a preferred embodiment, according to a last feature of the present invention with respect to the retaining loop, the retaining loop in the retaining loop closure region has a design stud covering the welding point. In contrast to the current PVC fabric tape loops, therefore, the closure is not realized by means of a relatively expensive zinc diecasting block, but by welding. For this purpose, gaps are left in the plastic casing on the relevant parts in order to ensure a connection of the tissue belt crucial for stability at these points. Thus, instead of the previous weak point - the perforation of the fabric tape for the little piece - a particularly broad and stable fabric tape layer is created. As a result, the stability of this wrist strap will increase the stability of the PVC Fabric tape still outperform straps. Because of the gap in the sheath creates a supposedly unsightly gap, for optical reasons around the welding point a Designböckchen can be attached, which now has to fulfill only design purposes and is no longer decisive for the stability. In this respect, this can be procured or produced much cheaper.

• 1. Es kann ein Arbeitsschritt in der Produktion eingespart werden und somit kostengünstiger produziert werden.
• 2. Da der noch weiche Kunststoff direkt auf das Gewebeband aufgetragen wird, entsteht eine Verbindung zwischen Gewebeband und Ummantelung, die dafür sorgt, dass sich das Gewebeband nicht mehr innerhalb der Ummantelung verdrehen kann bzw. dass die Ummantelung nicht mehr vom Gewebeband abrutschen kann.

The object underlying the invention is achieved according to the invention in terms of the method for producing the hand strap, that in the manufacture of the hand strap to the fabric tape directly a plastic, esp. A metallocene-catalyzed polyethylene plastic is extruded. Instead of the subsequent introduction of the fabric tape into a plastic tube, the plastic is then extruded directly around the fabric tape in the process according to the invention. This brings in particular two advantages

• 1. It can be a step in the production saved and thus produced more cheaply.
• 2. Since the still soft plastic is applied directly to the fabric tape, creates a connection between fabric tape and sheath, which ensures that the fabric tape can not rotate within the sheath or that the sheath can not slip off the fabric tape.

In the preferred embodiment of the method according to the invention, the retaining loop is subsequently crosslinked, in particular by electron bombardment. In addition to the above-mentioned advantage of a higher stability, this leads to the fact that the connection between fabric tape and sheathing continues to increase.

According to a further feature of the method according to the invention, it is provided that the fabric band of the holding loop is welded in the holding loop closure region. In a preferred embodiment, after welding in the holding loop closure region of the retaining loop, a design eyelet overlapping the welding point is applied. With regard to the resulting advantages, reference is made to the avoidance of repetition on the described advantages of the retaining loop according to the invention.

It is expedient, according to a further feature of the method according to the invention, that silver nitrations are additionally incorporated into the metallocene-catalyzed polyethylene plastic during production of the retaining loop. These silver nitrations act as a cell poison for bacteria and therefore disinfectant. Thus, in conjunction with the already bacteria-friendly plastic surface of the mkP a highly hostile environment is created, which ensures that, firstly, bacteria can accumulate badly and second, die quickly. A risk of infection by the frequently changing skin contact on the loop is thus minimized.

It is recommended according to a further feature of the method according to the invention that in the production of the hand strap additionally luminescent pigments are incorporated in the metallocene-catalyzed polyethylene plastic. These luminescent pigments ensure that the straps are always visible even when driving at night. This is particularly important when a passenger who may not have been holding fast, quickly seeks a hold in an unexpected braking maneuver or cornering.

According to a last feature of the present invention with respect to the method according to the invention, it is provided that in the manufacture of the retaining loop additionally flame retardant additives, in particular phosphate-based, are incorporated into the metallocene-catalyzed polyethylene plastic in order to meet the strict fire safety standards for commercial vehicles / passenger.

The invention is illustrated in the figures of the drawing in an embodiment. Show it:

1 a side view of the retaining strap according to the invention,

2 a sectional perspective view of the retaining loop according to the invention according to the section BB in 1 .

3 a very simplified representation of the retaining loop to be concealed in a first view,

4 a greatly simplified representation of the retaining loop to be concealed in a second view,

5 a greatly simplified representation of the wrist strap to be welded in a third view,

6 a greatly simplified representation of the wrist strap to be welded in a fourth view.

The arrangement according to the invention relates to a retaining loop, in particular retaining loop for vehicles, and is generally with 10 designated. The retaining strap according to the invention 10 includes, see, for. B. the 1 and 2 of the Drawing, one about at least one fabric tape 12 reinforced, flexible, with 11 designated retaining strap and a strap loop area 13 , It is in the 1 the drawing is a side view of the retaining loop according to the invention 10 and in the 2 the drawing is a perspective sectional view of the retaining loop according to the invention 10 according to the section BB in 1 shown. Like in this one 2 can be seen, has the retaining strap according to the invention 10 in the illustrated embodiment exactly a fabric tape 12 on.

It is inventively provided that the retaining strap 10 in which the fabric tape 12 surrounding area essentially based on a metallocene-catalyzed polyethylene plastic 14 is formed. By developing this PVC-free wrist strap 10 For the first time, the contradiction between PVC freedom and optimum properties is solved by simple means, with respect to the resulting advantages, reference is made to the detailed statements made above.

In a preferred embodiment, the retaining loop 10 self-disinfecting, optionally with additional embedded silver nitrations. These silver nitrations act as a cell poison for bacteria and therefore disinfectant. Thus, in conjunction with the already bacteria-friendly plastic surface of the mkP a highly hostile environment is created, which ensures that, firstly, bacteria can accumulate badly and second, die quickly. A risk of infection by the frequently changing skin contact on the loop is thus minimized.

Furthermore, the strap 10 have noctilucent pigments.

The wrist strap 10 will therefore be easily recognizable even in the dark (eg when driving at night). Thus, it offers a higher level of safety, as now in the dark in a surprising driving maneuver the straps 10 are clearly visible and thus easier and faster to be taken.

The retaining strap according to the invention 10 also has elastomeric properties produced by subsequent crosslinking, in particular electron bombardment. By this subsequent networking of the strap z. B. by electron bombardment, the plastic is given by these elastomeric properties a higher stability.

The wrist strap 10 may also contain fire-retardant additives, in particular phosphate-based, in order to comply with the strict fire safety standards for commercial vehicles / passenger transport.

It is further contemplated that the retaining loop 10 in the strap loop area 13 in the area of the fabric tape 12 welded is formed, see the 3 to 6 the drawing. In this case, in the illustrated embodiment, the retaining strap 10 in the strap loop area 13 a decorative hinge covering the welding point 16 on. In contrast to the current PVC fabric tape loops, therefore, the closure is not realized by means of a relatively expensive zinc diecasting block, but by welding. For this purpose, gaps are left in the plastic sheath at the relevant points, see 3 . 4 and 5 to connect the fabric tape crucial for stability 12 to ensure these places. 3 shows the strap 10 in the ground state, 4 just before and 5 shortly after welding. Thus, instead of the previous weak point - the perforation of the fabric tape for the little piece - a particularly broad and stable fabric tape layer is created. This will increase the stability of this wrist strap 10 the stability of PVC fabric strap straps still surpass. Since a supposedly unsightly gap is created by the gap in the sheath, here for visual reasons around the welding point is a Designböckchen 16 attached, see 6 i. V. m. 1 which, however, now only has to fulfill design purposes and is no longer decisive for stability. In this respect, this can be procured or produced much cheaper.

The invention also relates to a method for producing such a retaining loop 10 , It is inventively provided that in the production of the strap 10 around the fabric band 12 directly a plastic, in particular a metallocene-catalyzed polyethylene plastic 14 , is extruded. Instead of the subsequent introduction of the fabric tape in a plastic tube so here is the plastic directly to the fabric tape 12 extruded. This brings in particular two advantages, so a step in the production can be saved and thus produced more cheaply, also is by applying the still soft plastic directly on the fabric tape 12 a connection between fabric tape 12 and sheathing emerge, which ensures that the fabric tape 12 can no longer rotate within the sheath or that the sheath is no longer from the fabric band 12 can slip.

In the method according to the invention is also provided that the retaining loop 10 is subsequently crosslinked, in particular by electron bombardment, that the fabric tape 12 the wrist strap 10 in the strap loop area 13 is welded, and here after concealing in the strap loop area 13 the wrist strap 10 a decorative hinge covering the welding point 16 is attached that in the manufacture of the lanyard 10 additionally silver nitrations in the metallocene-catalyzed polyethylene plastic 14 be incorporated in that during the production of the lanyard 10 additionally luminescent pigments in the metallocene-catalyzed polyethylene plastic 14 be stored and that in the production of the lanyard 10 additionally fire retardant additives, in particular based on phosphate, in the metallocene-catalyzed polyethylene plastic 14 be stored. The resulting advantages are described in detail above.

• 1. Die Stabilität der Halteschlaufen 10 könnte um voraussichtlich 50 N auf dann 300 N erhöht werden, da die Schwachstelle der Lochung des Gewebebandes 12 am Böckchen vermieden wird und durch das mehrlagig verschweißte Gewebeband 12 ersetzt wird. Somit wird die Sicherheit erhöht.
• 2. Die Halteschlaufe wird vollkommen PVC-frei sein. Dies sorgt dafür, dass... a. ... die Gefahr der Entstehung der bei PVC-Bränden vorkommenden, stark toxischen Gase vermieden werden. b. ... das die gesundheitsschädlichen Eigenschaften von PVC und insbesondere den enthaltenen Weichmachern vermieden werden.
• 3. Es wird die erste selbst-desinfizierende Halteschlaufe am Markt sein. Dies wird insbesondere durch zwei Neuerungen erreicht: a. Der verwendete Kunststoff ist lebensmittelecht und bietet daher Bakterien eine sehr schlechte Lebensumgebung. Eine Anhaftung von Bakterien ist unwahrscheinlich. b. Durch die Einbringung von Silbernitrationen wird darüber hinaus eine bakterizide Umgebung geschaffen, die Bakterien abtötet.
• 4. Die Schlaufe wird die erste Halteschlaufe sein, die nachleuchtet. Somit wird Sie auch bei Dunkelheit (z. B. bei Nachtfahrten) gut erkennbar sein. Somit bietet sie ein höheres Maß an Sicherheit, da nun auch in der Dunkelheit bei einem überraschenden Fahrmanöver die Halteschlaufen gut sichtbar sind und somit einfacher und schneller ergriffen werden können.
• 5. Aufgrund der PVC-ähnlichen Eigenschaften des mkP können die positiven Aspekte des PVC ohne dessen Nachteile nutzbar gemacht werden. Dies sind unter anderem: a. Eine angenehm weiche Haptik, die ein unangenehmes Einschneiden auch bei hohen Zugbelastungen vermeidet. b. Die Schlaufen werden auch eine, mit dem PVC vergleichbare Griffigkeit erreichen, d. h., bei einer plötzlichen, starken Zugebelastung verrutschen die Halteschlaufen nicht und bieten die notwendige Sicherheit. c. Zeitgleich müssen die Schlaufen nicht an einer Stelle fixiert werden (wie bspw. die mit Gurt befestigten Griffe). Somit kann die Anordnung der Halteschlaufen je nach Fahrsituation durch die Fahrgäste angepasst werden.
• 6. Die Schlaufe wird schnell und einfach nachrüstbar sein. Ein Demontieren der Befestigungsstange wird hierfür nicht notwendig sein, da das Verschweißen mittels eines Handschweißgerätes vor Ort durchgeführt werden kann.
• 7. Die Schlaufe kann trotz der höheren Beschaffungskosten für den neuartigen Kunststoff sowie der nachleuchtenden und desinfizierenden Additive zu einem Preis auf dem aktuellen Niveau für PVC-Gewebeband-Halteschlaufen angeboten werden Dies ist aus folgenden Gründen möglich: a. Aufgrund des innovativen Herstellungsverfahrens „direktes Umextrudieren” des Kunststoffes um das Gewebeband kann ein Prozessschritt eingespart werden und somit effizienter produziert werden. b. Durch die Einsparung des Böckchens als stabilitätsgebendes Verbindungselement kann eine günstigere Herstellung dieses jetzt nur noch aus optischen Gründen integrierten Teils gewährleistet werden.
• 8. Die Schlaufe wird eine deutlich erhöhte Produktlebensdauer haben. Es wird daher erwartet, dass somit die Austauschzyklen in Bussen und Bahnen deutlich verringert werden können. Die längere Produktlebensdauer liegt in folgenden Eigenschaften begründet: a. Durch die nachträgliche Vernetzung des mkP durch Elektronenbeschuss wird dem Kunststoff eine höhere Stabilität durch elastomere Eigenschaften verliehen. Dies führt dementsprechend auch zu einer Reduzierung der Wartungskosten für die Bahnbetreiber. b. Da mkP im Gegensatz zu PVC eine Einstofflösung ist und kein Compound, besteht nicht das Risiko, das für die Grundeigenschaften wichtige Stoffe (wie bspw. die Weichmacher im PVC) aus dem Stoff migrieren und dieser somit seine positiven Eigenschaften (z. B. Elastizität) verliert. Somit kann auch hierdurch mit einer Verlängerung der Produktlebenszeit gerechnet werden. c. Da mkP und Gewebeband 12 nun eine feste Verbindung miteinander eingehen, wird vermieden, dass sich das Gewebeband 12 in der Ummantelung verdrehen kann und somit zu ungleichmäßiger Belastung und höherem Verschleiß der Ummantelung führt. d. Das mkP ist äußerst resistent gegen aggressive Stoffe wie bspw. Handschweiß.

Such a technical as well as product-side, technical innovation would thus be accompanied directly with the following advantages.

• 1. The stability of the straps 10 could be increased by about 50 N to then 300 N, since the weak point of the perforation of the fabric tape 12 is avoided on the block and through the multi-layer welded fabric tape 12 is replaced. Thus, the security is increased.
• 2. The strap will be completely PVC-free. This ensures that ... a. ... avoids the risk of the formation of highly toxic gases occurring in PVC fires. b. ... that the harmful properties of PVC and in particular the plasticizers contained are avoided.
• 3. It will be the first self-disinfecting wrist strap on the market. This is achieved in particular by two innovations: a. The plastic used is food safe and therefore provides bacteria with a very poor living environment. An adhesion of bacteria is unlikely. b. The introduction of silver titrations also creates a bactericidal environment that kills bacteria.
• 4. The loop will be the first lanyard that luminesces. Thus, it will be easily recognizable even in the dark (eg during night driving). Thus, it offers a higher level of safety, since now in the dark in a surprising maneuver the handrails are clearly visible and thus can be taken easier and faster.
• 5. Due to the PVC-like properties of the mkP, the positive aspects of PVC can be harnessed without its disadvantages. These include: a. A pleasantly soft feel that avoids unpleasant cutting even at high tensile loads. b. The straps will also achieve a grip comparable to that of PVC, ie, in the event of a sudden, heavy load, the straps will not slip and provide the necessary safety. c. At the same time, the loops do not have to be fixed in one place (such as the handles fastened with a strap). Thus, the arrangement of the straps can be adjusted depending on the driving situation by the passengers.
• 6. The loop will be quick and easy to retrofit. A disassembly of the mounting rod will not be necessary for this, since the welding can be carried out by means of a manual welder on site.
• 7. The loop can be offered for a price at the current level for PVC fabric strap loops, despite the higher cost of purchasing the novel plastic and the luminescent and disinfecting additives. This is possible for the following reasons: a. Due to the innovative manufacturing process "direct extrusion" of the plastic around the fabric band, a process step can be saved and thus be produced more efficiently. b. By saving the bucket as stability-giving connecting element, a more favorable production of this now only for optical reasons integrated part can be ensured.
• 8. The loop will have a significantly increased product life. It is therefore expected that thus the exchange cycles in buses and trains can be significantly reduced. The longer product life is due to the following characteristics: a. The subsequent crosslinking of the mkP by electron bombardment gives the plastic a higher stability through elastomeric properties. Accordingly, this also leads to a reduction of the maintenance costs for the railway operators. b. Since mkP, in contrast to PVC, is a single-substance solution and not a compound, there is no risk of migrating the substance important for the basic properties (such as, for example, the plasticizers in the PVC) out of the substance and thus giving it its positive properties (eg elasticity). loses. Thus, this can also be expected to extend the product life. c. Because mkP and fabric tape 12 Now make a firm connection with each other, it will avoid that the fabric tape 12 can twist in the sheath and thus too leads to uneven loading and higher wear of the sheath. d. The mkP is extremely resistant to aggressive substances such as hand perspiration.

As already mentioned, the illustrated embodiments are only an example realization of the invention. This is not limited to it, but there are still many modifications and training possible. So are in particular modifications in the structural design of the retaining loop according to the invention 10 conceivable and modifications in individual process steps for their preparation. So z. As well as other types of welding of the retaining loop according to the invention 10 conceivable.

LIST OF REFERENCE NUMBERS

10

Wrist strap

11

Straps straps

12

cloth tape

13

Halteschlaufenveschlussbereich

14

metallocene-catalyzed polyethylene plastic

15

Verschweißstelle

16

Designböckchen

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102008056732 A1 [0004]

Claims (14)

Retaining loop ( 10 ), in particular retaining loop for vehicles, with at least one fabric band ( 12 ) reinforced, flexible strap strap ( 11 ) and a hold loop closure area ( 13 ), characterized in that the retaining loop ( 10 ) in which the fabric tape ( 12 ) surrounding area essentially based on a metallocene-catalyzed polyethylene plastic ( 14 ) is formed. Wrist strap according to claim 1, characterized in that the strap ( 10 ) self-disinfecting, optionally by additionally embedded silver nitrations, is formed. Retaining loop according to claim 1 or 2, characterized in that the retaining loop ( 10 ) noctilucent pigments. Holding loop according to one of claims 1 to 3, characterized in that the retaining loop ( 10 ) has produced elastomeric properties by subsequent crosslinking, in particular by electron bombardment. Holding loop according to one of claims 1 to 4, characterized in that the retaining loop ( 10 ) fire retardant additives, in particular phosphate-based. Holding loop according to one of claims 1 to 5, characterized in that the retaining loop ( 10 ) in the hold loop closure area ( 13 ) in the region of the tissue band ( 12 ) is formed welded. Retaining loop according to claim 6, characterized in that the retaining loop ( 10 ) in the hold loop closure area ( 13 ) the welding point ( 15 ) Covering Designböckchen ( 16 ) having. Method for producing a retaining loop ( 10 ), in particular retaining loop for vehicles, with at least one fabric band ( 12 ) reinforced, flexible strap strap ( 11 ) and a hold loop closure area ( 13 ), characterized in that in the manufacture of the retaining loop ( 10 ) around the fabric tape ( 12 ) directly a plastic, in particular in metallocene-catalyzed polyethylene plastic ( 14 ) is extruded. Method according to claim 8, characterized in that the retaining strap ( 10 ) is subsequently crosslinked, in particular by electron bombardment. Method according to claim 8 or 9, characterized in that the fabric tape ( 12 ) of the retaining loop ( 10 ) in the hold loop closure area ( 13 ) is welded. A method according to claim 10, characterized in that after welding in the strap loop area ( 13 ) of the retaining loop ( 10 ) the welding point ( 15 ) Covering Designböckchen ( 16 ) is attached. Method according to one of claims 8 to 11, characterized in that in the manufacture of the retaining loop ( 10 ) additionally silver nitrations in the metallocene-catalyzed polyethylene plastic ( 14 ) are stored. Method according to one of claims 8 to 12, characterized in that in the manufacture of the retaining loop ( 10 ) additionally luminescent pigments in the metallocene-catalyzed polyethylene plastic ( 14 ) are stored. Method according to one of claims 8 to 13, characterized in that in the manufacture of the retaining loop ( 10 ) additionally fire retardant additives, in particular phosphate-based, in the metallocene-catalyzed polyethylene plastic ( 14 ) are stored.

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