Laminated material, particularly for an airbag, method for the production thereof, airbag, passive restraint systems comprising an airbag, and gas-tight polyamide polymer film

The subject of the invention is a multilayer material, in particular for an airbag, a method of its production as well as a polyamide polymer film and its use.

Airbags are built into vehicles as standard to protect passengers from being injured in a collision. Airbags usually have a multi-layer structure. The support layer, for example woven, knitted or other flat products, is provided with plastic layers. The woven or knitted fabric provides the desired strength and the plastic layer holds the gas in the air cushion.

Such a multi-layer material for front airbags is shown, for example, in EP 0 966 352 B1. The polyamide polymer film has film layers with a softening point below 220 ° C, the polyamide of the polymer film having to meet certain requirements with regard to the polymeric base structure, in particular the alkyl branching. The polyamide polymer film is bonded to a polyamide or polyester fabric.

Different requirements are placed on the side airbags in contrast to the front airbags. As there is a risk of the passenger hitting the interior trim for an extended period in a side collision, the air bag must remain fully open, i.e. effective for a period of 20 to 40 seconds.

Still other requirements are placed on, for example, airbags for motorcyclists, which are built into a jacket, for example. The so-called avalanche airbags that can be integrated into the backpack also have to meet other requirements. The airbag should remain inflated to prevent the avalanche victim from collapsing under the snow cover. Depending on the case of use, the multi-layer material must therefore, on the one hand, allow a certain strength and, on the other hand, a predetermined reduction of air resistance. This is not satisfactorily possible with the known airbags. In order to achieve the desired tightness, clearly thicker layers of the materials used hitherto are required. This carries with it disadvantages such as increased production costs and insufficient functional properties. Moreover, problems arise in the subsequent disposal of the multi-layer material as waste, since different materials are most often used.

It is therefore the object of the invention to provide articles that avoid the drawbacks of the known products, and in particular to develop a multi-layer material, in particular for airbags and comparable applications, with determinable bursting resistance, very high gas tightness and possibly a defined trigger point for the release of gas. Moreover, it is an object of the invention to provide a polymer film, preferably based on polyamides, which is substantially gas-tight.

A multilayer material, in particular for an airbag, comprising a polymer film, preferably a polyamide polymer film, bonded to a support layer, in particular a woven, knitted, non-woven or netting, the polymer film having at least one first and second layer, according to the invention being characterized by that the first layer of the polymer film, preferably a polyamide polymer film, is formed from a material with a glass transition temperature less than -10 ° C, and a second layer of a polymer film of a material having a glass transition temperature less than 20 ° C, the second layer material comprising at least one copolyester, copolyamide, or polyamide elastomer, and the second layer material has a softening point of 170 ° C or greater, and the first and / or second material the layers contain at least one flame retardant selected from the group consisting of halogen flame retardants, phosphate ester, alumina trihydrate, magnesium oxide dihydrate, red phosphorus, zinc borate, ammonium polyphosphate, melamine cyanurate, zinc tinate or zinc hydroxycinate, and the backing layer comprises filaments or yarns of polyamide or polyester, and is preferably woven, knitted, non-woven or mesh.

Preferably, the material of the first layer has a glass transition temperature less than -20 ° C, more preferably less than -30 ° C and the material of the second layer has a glass transition temperature less than 10 ° C, particularly preferably less than 0 ° C.

The copolyester, copolyamide or polyamide elastomer has a combination of polymer blocks of polyamide 6, polyamide 6.6, polyamide 11, polyamide 12 or mixtures thereof with polymer blocks of polyethylene glycol, polypropylene glycol, polytetrahydrofuran or mixtures thereof.

PL 216 371 B1

The second layer material comprises a polyamide elastomer selected from a combination of polyamide 6.6 polymer blocks with polyethylene glycol or polypropylene glycol or a combination of polyamide 12 polymer blocks with polytetrahydrofuran.

A method for producing a multilayer material, especially for an airbag, in which a polymer film, preferably a polyamide polymer film, is provided, comprising at least two layers, then the polymer film is bonded, especially laminated to a support layer, preferably a woven, knitted, non-woven or mesh, with whereby a carrier layer, preferably containing polyamide or polyester, is used, according to the invention the first layer of the polymer film, preferably a polyamide polymer film is formed from a material with a glass transition temperature less than -10 ° C and the second layer of the polymer film is formed from a material with a glass transition temperature less than 20 ° C, a material comprising at least one copolyester being used as the material of the second layer , a copolyamide or a polyamide elastomer, and this material has a softening point greater than 170 ° C, in addition, the material of the first and / or second layer comprises as an additive flame retardant selected from the group consisting of halogen flame retardants, phosphate ester, alumina trihydrate, magnesium oxide dihydrate, red phosphorus, zinc borate, ammonium polyphosphate, melamine cyanurate, zinc tinate or zinc hydroxycinate wherein the polymer film and / or the layers are produced by extrusion and the extruded layers are laminated together.

Preferably, the process uses a copolyester, copolyamide or polyamide elastomer having a combination of polymer blocks of polyamide 6, polyamide 6.6, polyamide 11, polyamide 12 or mixtures thereof with polymer blocks of polyethylene glycol, polypropylene glycol, polytetrahydrofuran or mixtures thereof. especially a combination of polyamide 6.6 polymer blocks with polyethylene glycol or polypropylene glycol or a combination of polyamide 12 polymer blocks with polytetrahydrofuran.

The polyamide polymer film according to the invention comprising at least two layers is characterized in that the first layer has a glass transition temperature of less than -10 ° C, the second layer has a glass transition temperature of less than 20 ° C, and the second layer comprises at least one copolyester, copolyamide or a polyamide elastomer, the copolyester, copolyamide or polyamide elastomer having a combination of polymer blocks of polyamide 6, polyamide 6.6, polyamide 11, of polyamide 12 or their mixtures with polymer blocks of polyethylene glycol, polypropylene glycol, polytetrahydrofuran or mixtures thereof, and the material has a softening point above 170 ° C, while the material of the first and / or second layer contains at least one flame retardant selected from the group consisting of halogen flame retardants , phosphate ester, alumina trihydrate, magnesium oxide dihydrate, red phosphorus, zinc borate, ammonium polyphosphate, melamine cyanurate, zinc tinate or zinc hydroxycinate.

Preferably, the material of the first layer has a glass transition temperature less than -20 ° C, more preferably less than -30 ° C and the material of the second layer has a glass transition temperature less than 10 ° C, particularly preferably less than 0 ° C.

In the inventive polyamide polymer film, the material of one layer, preferably the second layer, is a polyamide elastomer, selected from a combination of polyamide 6.6 polymer blocks with polyethylene glycol or polypropylene glycol or a combination of polyamide 12 polymer blocks with polytetrahydrofuran.

Use of the inventive polyamide polymer film in a multi-layer material, in particular for an airbag.

The material of the first layer, which is also the adhesive layer of the polymer film, should have the lowest possible glass transition temperature Tg, since the layer must be as soft and flexible as possible; in particular, it must still be flexible enough at -30 ° C. This flexibility ensures that the adhesive layer can guarantee a sufficient bond between the polymer film and the fabric even at low temperatures. The adhesive layer also has a lower softening temperature range than the material of the second layer that serves as the top layer of the polymer film. This material must meet a number of requirements: the material must have a high softening point, the top layer must be prevented from sticking to another surface layer lying on it, even when stored at temperatures above 125 ° C. The cover layer material must then be sufficiently flexible, even at a temperature of - 30 ° C. -30 ° C is the standard temperature for testing airbag material resistance at low temperatures. Top layer at such low temperatures

It must remain intact in order to be able to maintain the tightness of the polymer film when the air cushion opens.

Advantageously, the adhesive layer consists of low-melting, soft polymers with a Tg of more preferably lower than minus 20 ° C and can come into good bonding with the polyamide fabric used. The materials may also preferably be polyurethanes with a softening range of 100-160 ° C and a Shore A hardness of less than 95 (suitable products are for example manufactured by Huntsman, Huntsman Polyurethanes, 2190 Executive Hills Boulevard, Auburn Hills, MI 48326, USA; Bayer Polymers, D-51368, Leverkusen, Germany or Merquinsa, Gran Vial 17, 08160, Montmelo, Barcelona, ​​Spain).

The above-mentioned sticking of the outer layer must not occur with the folded, built-in airbag. Also in the case of the use envisaged according to the invention for sails (sailboats, surfers, etc.), there must be no sticking in the compressed state.

Preferably, the material of the second layer comprises a copolyester, a copolyamide or a polyamide elastomer. The material has a softening point of more than 170 ° C. Such materials can meet the requirements, that is, they have a low coefficient of sliding friction, good resistance to sudden changes in temperature, good resistance to scrubbing, they are very flexible and soft.

Further, copolyester, copolyamide or polyamide elastomeric materials having a combination of polymer blocks of polyamide 6, polyamide 6.6, polyamide 11, polyamide 12 or mixtures thereof with polymer blocks of polyethylene glycol, polypropylene glycol, polytetrahydrofuran or mixtures thereof are preferred. Polyamide elastomers with a combination of polyamide 6.6 polymer blocks with polyethylene glycol or polypropylene glycol or with a combination of polyamide 12 polymer blocks with polytetrahydrofuran have proved to be particularly advantageous. Such polyamide elastomers are distributed, inter alia, by Degussa (Vestamid E series) or Atofina (PEBAX series).

A significant advantage of using these polymeric materials with polyamide blocks for a multilayer material is easier waste disposal, since substantially identical or at least similar material grades are used to construct this layered material. The above-described materials can be used (alone or in combination or mixture with other plastics).

Additional layers in multi-layer construction are also possible.

The copolyester, copolyamide or polyamide elastomer may optionally contain modifying additives such as antioxidants, anti-adhesives (e.g. fatty acid amides) or anti-blocking agents (e.g. silica) to improve the properties of these materials, such as stability or workability.

In a further preferred embodiment of the multi-layer airbag material, the material of the first and / or the second layer comprises at least one flame retardant. These flame retardants can be based on halogen-containing or halogen-free components. Halogen flame charges (Flammbatches) contain, for example, decabromo-cyclohexane, octabromo-diefnylether etc. or antimony trioxide (Sb2O5) in the carrier polymer, which is most often LDPE. Halogen-free flame retardants may also be used, for example, a phosphate ester, alumina trihydrate, magnesium oxide dihydrate, red phosphorus, zinc borate, ammonium polyphosphate, melamine cyanurate, zinc tinate or zinc hydroxycinate.

The addition of the flame retardant increases the stability of the polymer film of the multi-layer airbag material against the thermal stress caused by hot exhaust gases released when the airbag is deployed. This avoids melting or ignition of the polymer film and thus a malfunction of the airbag.

It is also possible to color at least one of the layers of the polymer film. This allows a simple distinction between the adhesive layer and the cover layer.

Preferably, the multilayer material, especially for an airbag, has a support layer which can be made of filaments or yarns of polyamide or polyester, for example woven. The carrier layer can also be in the form of a non-woven or crochet or knitted fabric, it can be woven or it can be a grid. The carrier material and the foil layer must be joined together. This can be achieved primarily through the gluing or lamination process. In this case, for example, one of the layers or the carrier material can be joined at the softening point with the other layer or layers by pressing or on a laminating device. The bonding or lamination of the carrier material and the foil layer may be performed in stages or in one

A work operation. It is essential that the multi-layer material includes a single layer to reinforce and adjust the strength of the airbag and to ensure gas tightness. Obviously, the support layer contributes somewhat to the strength and the support layer can contribute to the gas tightness. The carrier layer can also be pretreated or pre-coated.

The invention also relates to a method for producing the multilayer material according to the invention. The method comprises the steps of providing a polymer film comprising at least two layers and laminating the polymer film to a support layer, preferably a woven or knitted fabric, preferably a polyamide article. The polymer film or the materials of the first and second layers have identical properties to those already mentioned above for the multi-layer material.

The polymer film or the first and second layers thereof can be produced by extrusion. A suitable extrusion method is extrusion blow molding, and other types of extrusion used for film production, in particular co-extrusion, are also very well suited. However, it is important in these types of embossing that the films or films can be produced in the desired thicknesses. A preferred extrusion method is co-extrusion by blown film or coextrusion of flat films. Such extrusion methods are known to the person skilled in the art.

If, in one embodiment of the process, the first and second layers are produced by separate extrusion, these layers are laminated in a subsequent process step to form a polymer film. By means of this additional step, it is possible to also use polymer films consisting of different materials for the production of a multi-layer material for an airbag.

The invention also relates to a polyamide polymer film comprising at least two layers. The polyamide polymer film is characterized in that the first layer has a glass transition temperature below -10 ° C, the second layer has a glass transition temperature below 20 ° C, and the second layer comprises at least one copolyester, copolyamide or polyamide elastomer, the polyamide elastomer having a temperature of softening above 170 ° C. Preferably, the material of the first layer has a glass transition temperature below -20 ° C, more preferably below -30 ° C and the material of the second layer has a glass transition temperature below 10 ° C, particularly preferably below 0 ° C.

The polyamide polymer film preferably has identical properties and components as already described above in the explanation of the multi-layer airbag material.

The polyamide polymer film according to the invention is extremely gas-impermeable and can therefore advantageously be used as a gas-tight covering for a fabric. The use for the production of airbags or sails gives many surprising advantages and guarantees high design flexibility. The invention is explained in more detail below by means of examples.

Examples 1 to 3

Vestamid E40 S3 films (Example 1) are produced by means of blow extrusion,

Vestamid E62 S3 (Example 2) and Vestamid EX 9200 (Example 3) (Manufacturer Degussa) with weights ₂ 20, 35 and 45 g / m2². Flame retardant films were also made from the same raw materials by adding 0% (1-0, 2-0, 3-0) 5% (1-5, 2-5, 3-5), 10% (1-10, 2- 10, 3-10) or 20% (1-20, 2- 20, 3-20) of a commercially available flame retardant (Luvogard PE 81, by Lehmann & Voss) incorporated into polyethylene (the designations reflect the exemplary compound first, and second proportion of the flame retardant). The extruder-blow molding machine used is a Collins installation (type 25x30D equipped with a commercially available 5-zone screw, suitable for extruding various polymers). It has a suitable extraction for the blown film (type 180/400).

The extrusion of the film was carried out under the conditions indicated in Table 1.

Table 1:

Extrusion conditions for Examples 1-3

<td>Raw material</td><td>Draft in ° C</td><td>Cooking zone 1-5 increasing</td><td>Head temperature in ° C</td><td>Comments</td>

<td>1-0, 1-5, 1-10 or 1-20</td><td> 155</td><td> 170-200</td><td> 200</td><td>All films are very soft, without aggregation of filler particles, with very good mechanical properties</td>

<td>2-0, 2-5, 2-10 or 2-20</td><td> 155</td><td> 170-200</td><td> 200</td><td>As for Ex. 1</td>

<td>3-0, 3-5, 3-10 or 3-20</td><td> 170</td><td> 190-230</td><td> 230</td><td>As for Ex. 1</td>

PL 216 371 B1

The individual films were laminated together to form 2-layer films in a double-strip flat lamination plant (Type KFK-S 400 700).

Installation for flat lamination with tape: 2 endless tapes guide the product through the installation. One tape runs around the top of the laminating plant and another tape runs around the bottom. Both belts are driven by the same motor, so that the belts always run synchronously.

The speed of the belts can be adjusted in steps. The gap between the top and bottom of the installation (height) can be changed to match the thickness of the product. After heating, many products require pressure from the press. Two press rollers press against the product with a pre-selected force. The upward movement of the upper ironing cylinder is limited by an adjustable travel stop. This movement limiter is called a level (Niveau). The ironing cylinder therefore presses with a predetermined force against the product, but not further than the horizontal travel stop allows. After passing through the press rolls, the laminate is guided through the cooling area by means of straps and can be wound up at the end of the installation.

It can be used as an adhesive layer (i.e. as the first layer) or as a low-melting layer₂ a foil with a weight per square meter of 35 or 45 g / m is used² with Vestamid E40 S3 with a glass transition temperature of -60 ° C with 0% (1-0), 5% (1-5) or 10% (1-10) of a mixture of PE and flame retardant. Film 22 made of 18 g / m2 was used as the outer layer (i.e. as the second layer) or the high-melting layer.² Vestamid E62S with a glass transition temperature of + 10 ° C or 20 g / m² Vestamid EX 9200 with 0% (2-0, 3-0), 10% (2-10, 3-10) or 20% (2-20, 3-20) of an equal mixture of PE and flame retardant.

The lamination of the described films into 2-layer films took place under the following conditions:

Laminating temperature 170 ° C

Layer thickness 0.1 mm

Level (Height adjustment 0 mm of the upper ironing cylinder)

1N pressure exerted

Laminating speed 6 m / min

In another manufacturing method, a 2-layer film consisting of a material was produced₂ g / m² Vestamid EX 9200 with a 10% mixture of PE and flame retardant (3-10) and Vestamid E 40 S3 with a 5% mixture of PE flame retardant (1-5) on a 3-layer blown film coextrusion plant, which is nowadays state of the art and manufactured and distributed by companies, ₂ such as Reifehnhauser, Alpinie or Windmoller-Holscher. The layer thickness distribution was 22.5 g / m2 of component 1-5 (extruder 1), 22.5 g / m2² component 1-5 (extruder 2) and 20 gsm² component 3-10 (extruder 3).

The 2-layer or coextruded 2-layer film thus produced is laminated onto a polyamide fabric made of high-strength yarns (OPW type, Berger Safety Textiles) on a Meyer double-belt laminating system for layers. Such multilayer materials are, as already mentioned, preferably used as fabric seals for airbags.

The process conditions for laminating layered films onto a fabric are as follows:

Laminating temperature 170 ° C

Layer thickness 0.1 mm

Level (Height adjustment 0.5mm of the upper ironing cylinder)

18N pressure exerted

Lamination speed 1 m / min

Examples 4 to 19 and Comparative Examples 1 to 2

The previously described bonded layers of the 2-layer airbag fabric film were tested for separability of the top layer from another top layer in close contact with the first layer. For this purpose, a top layer of a sample of 10 x 10 cm was placed over a top layer of another sample that was also 10 x 10 cm. This stack was loaded with a weight of 10 kg and left in a hot air oven for 14 days at 125 ° C. After this time, various pieces of fabric were removed from the oven and stored for 1 hour. in room temperature. After cooling, the separation properties of the pieces of fabric were determined by means of measurements. The results are presented in Table 2. The data relating to the adhesive layer or the top layer refer to the compounds given in Examples 1-3 together with the respective added amounts of the mixture of PE and protective agent and to the surface weight of the film, i.e. 1-0 / 35 means, for example, a Vestamid film. E40 S3 base additive of flame retardant with surface weight ₂ of 35 g / m².

The comparative examples are representative examples of various material combinations of extruded, thermoplastic polyesters, polyether polyurethanes or polyester polyurethanes. PU1 here corresponds to a thermoplastic polyester polyurethane with a melting point range of 110-130 ° C. and a Shore A hardness of 85. Such products are manufactured and distributed, for example, by Huntsman, Huntsman Polyurethanes, 2190 Executive Hills Boulevard, Auburn Hills, MI 48326, USA; Bayer Polymers, D-51368 Leverkusen, Germany or Merquinsa, Gran Vial 17, 08160 Montemelo, Barcelona, ​​Spain.

PU2 is a high-melting polyester polyurethane with a softening temperature range of 160-170 ° C and a Shore A hardness of 85-90. Such products are manufactured and distributed by Bayer Polymers, D-51368 Leverkusen, Germany or Merquinsa, Gran Vial 17, 08160 Montemelo, Barcelona, ​​Spain. PES is a high-melting polyester with a melting range of 210-220 ° C and a Shore A hardness of D 57. Such products are manufactured and distributed by, inter alia, DSM, DSM Engineering Plastics, Poststraat 1, N-6130 AA Sittard or Eastman, Eastman Chemical Company, 100 North Eastman Road, PO Box 511, Kingsport, TN 37662-5075.

Table 2:

Attempts at separating Examples 4 to 19 and Comparative Examples 1 and 2

<td>Example</td><td>Layer sticky</td><td>Layer outer</td><td>Separation behavior *</td>

<td> 4</td><td> 1-0/35</td><td> 2-5/18</td><td> 1</td>

<td> 5</td><td> 1-0/35</td><td> 2-10/18</td><td> 1</td>

<td> 6</td><td> 1-0/35</td><td> 2-20/18</td><td> 1</td>

<td> 7</td><td> 1-5/45</td><td> 2-5/18</td><td> 1</td>

<td> 8</td><td> 1-5/45</td><td> 2-10/18</td><td> 1</td>

<td> 9</td><td> 1-5/45</td><td> 2-10/18</td><td> 1</td>

<td> 10</td><td> 1-10/45</td><td> 2-5/18</td><td> 1</td>

<td> 11</td><td> 1-10/45</td><td> 2-10/18</td><td> 1</td>

<td> 12</td><td> 1-10/45</td><td> 2-20/18</td><td> 1</td>

<td> 13</td><td> 1-0/35</td><td> 3-0/20</td><td> 1</td>

<td> 14</td><td> 1-0/35</td><td> 3-10/20</td><td> 1</td>

<td> 15</td><td> 1-5/45</td><td> 3-0/20</td><td> 1</td>

<td> 16</td><td> 1-5/45</td><td> 3-10/20</td><td> 1</td>

<td> 17</td><td> 1-10/45</td><td> 3-0/20</td><td> 1</td>

<td> 18</td><td> 1-10/45</td><td> 3-10/20</td><td> 1</td>

<td> 19</td><td> 1-5/45**</td><td> 3-10/20**</td><td> 1</td>

<td>Ex. 1</td><td>PU1 / 45</td><td>PES / 20</td><td> 3</td>

<td>Ex. 2</td><td>PU1 / 45</td><td>PU2 / 20</td><td> 4</td>

*: 1 = Both layers can be separated without applying force, = Both layers can be separated easily, = Both layers can still be separated, = Both layers cannot be separated without damaging the surface (Tearing of the adhesive).

**: Co-embossed foil

In another series of tests, the adhesion of the adhesive layer to the fabric or to the top layer was tested. For this purpose, laminates were produced with the following layer sequence:

PA fabric - adhesive layer - top layer - adhesive layer - top layer adhesive layer - PA fabric. These laminates had a size of 5 x 20 cm.

PL 216 371 B1

For lamination, two prefabricated units of fabric and 2-layer film with an adhesive layer composed of Vestamid E40 S3 with a 45% mixture of PE and flame retardant (1-45) were laminated onto each other. In addition, the same conditions apply as for the production of the fabric assembly and the 2-layer film as described previously.

In each case, 6 suitable laminates were produced from each combination. In each case, 2 laminates are fixed after production in a tensile testing machine (type 1120.25 from Zwick, AugustNagel-Strasse 11, D-89079 Ulm, Germany) and the resistance to peeling when stored at room temperature is measured. Peeling resistance of&gt; 0.6 N / mm is generally assessed as good. Two of the laminates were placed in boiling water for one hour. After drying at room temperature for 6 hours, the resistance to peeling was measured again. The peeling value should not be less than 70% of the initial value. The cooking test was supposed to imitate the humid-hot climatic conditions in the car. From the measured values ​​of Table 3 it follows that along with the thicker₂ an adhesive film of 45 g / m² better results are obtained biased.

According to DIN 53375, the kinetic friction coefficient is determined. A possibly low coefficient means that the surfaces slide well against each other, which is especially important especially when the airbag is opening, otherwise difficulties such as substantially uneven expansion may occur. A factor of &lt;0.6 is considered sufficient. For the same reason, the previously described storage test is carried out at 125 [deg.] C. of the surface, that is to say of the outer layers to each other.

As a further test, a horizontal flame test was performed analogously to the UL 94HB standard. The horizontally tensioned belt was flashed with a Bunsen burner in the center for 20 seconds and ignited. It was examined if the belt burned completely. If it doesn't burn out, it qualifies as okay. Polyamide elastomers are inherently flame retardant. On the other hand, the strands with a PU and polyester top layer burned out. A very good flame resistance is obtained by adding a 10% mixture of PE and flame retardant in the top layer and 5% mixture in the adhesive layer. Table 3 summarizes the results of the tests described.

Table 3:

Properties of various combinations of adhesive and top layer.

<td rowspan="2">Example</td><td colspan="2">Peeling resistance</td><td rowspan="2">Value of friction (slip) Standard 0.25 μ</td><td rowspan="2">Self-extinguishing in% of fire tests</td>

<td>When stored at room temperature (Norm&gt; 1 N / mm)</td><td>After the cooking test of 100 ° C / 1h in N / mm</td>

<td> 1</td><td> 2</td><td> 3</td><td> 4</td><td> 5</td>

<td> 4</td><td> 0,91</td><td> 0,73</td><td> 0,38</td><td> 50</td>

<td> 5</td><td> 0,79</td><td> 0,50</td><td> 0,44</td><td> 25</td>

<td> 6</td><td> 0,92</td><td> 0,59</td><td> 0,41</td><td> 40</td>

<td> 7</td><td> 0,70</td><td> 0,66</td><td> 0,47</td><td> 100</td>

<td> 8</td><td> 0,94</td><td> 0,74</td><td> 0,38</td><td> 84</td>

<td> 9</td><td> 1,02</td><td> 0,96</td><td> 0,46</td><td> 100</td>

<td> 10</td><td> 0,68</td><td> 0,64</td><td> 0,38</td><td> 100</td>

<td> 11</td><td> 0,62</td><td> 0,54</td><td> 0,46</td><td> 100</td>

<td> 12</td><td> 0,68</td><td> 0,52</td><td> 0,40</td><td> 100</td>

<td> 13</td><td> 0,64</td><td> 0,44</td><td> 0,42</td><td> 100</td>

<td> 14</td><td> 0,78</td><td> 0,46</td><td> 0, 44</td><td> 100</td>

<td> 15</td><td> 0,75</td><td> 0,7</td><td></td><td> 100</td>

<td> 16</td><td> 0,79</td><td> 0,72</td><td></td><td> 100</td>

<td> 17</td><td> 0,63</td><td> 0,48</td><td></td><td> 100</td>

<td> 18</td><td> 0,73</td><td> 0,57</td><td></td><td> 100</td>

<td> 19</td><td> 0,8</td><td> 0,73</td><td> 0,4</td><td> 100</td>

<td>V1</td><td></td><td></td><td> 0,6</td><td> 0</td>

<td>V2</td><td></td><td></td><td> 0,8</td><td> 0</td>

PL 216 371 B1