## 3 Results and Discussion
### Vertical (VFT) and Horizontal (HFT) Flammability Tests (UL-94)  
Characteristic parameters of the combustion process, carried out using the UL-94 method in horizontal (HB or HFT) and vertical (VB or VFT) mode, are summarized in Tables 3 and 4. They enable us to qualify the polymer materials obtained into individual flammability classes in accordance with ISO 1210. In the case of a horizontal system, as the initial value of ignition time, the time when the flame reached the beginning of the measurement line, determined by the start line, was considered. Both reference materials (REF, REFMMT) showed different behavior in the flame during the measurements, however, each of them was completely burned. The incorporation of MMT into the polymer matrix led to a four-fold reduction in the number of detached fragments of the molten material. The reason for this phenomenon can be the reduced mobility of polymer chains in the presence of aluminosilicate packages. During the combustion of the nanocomposite, the formation of a protective barrier was observed in the form of charcoal, resulting from the combustion of dispersed MMT layers in a polyamide matrix. Moreover, in this case, the flame reached a much higher height. The molten parts of the REF and REFMMT materials broke off together with the flame under the influence of the acting force of gravity, nevertheless, the time intervals of the falling fragments of the polyamide matrix were noticeably smaller. Analyzing the combustion process of the unreinforced polymer matrix coated with triple layers using the LbL method, it was found that an increase in the degree of deposition of solution materials \begin{table}
\begin{tabular}{c c c} \hline \hline
**Sample** & **LOI (\% Oxygen)** & **\(\Delta\)LOI (\% Oxygen)** \\ \hline
**REF** & 19.8 & - \\
**5L** & 19.6 & \(-\)0.2 \\
**10L** & 19.4 & \(-\)0.4 \\
**15L** & 19.3 & \(-\)0.5 \\ \hline
**REFMMT** & 19.7 & - \\
**5 LMMT** & 19.9 & 0.2 \\
**10 LMMT** & 19.9 & 0.2 \\
**15 LMMT** & 20.1 & 0.4 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Limiting oxygen index (LOI) value summary for the coated polymeric materials using the layer-by-layer (LbL) method. and polyelectrolyte dispersions resulted in an increase in the average combustion rate (Table 3). The consequence of the deposition of the triple layers in the number of ten was the crossing of the starting line by the flame, nevertheless, this material did not completely burn. The main cause of this phenomenon was found in the rapid flame breakdown together with the alloy, interrupting the process of maintaining the heat. In addition, a few seconds before the extinguishing of the material itself, the appearance of air bubbles on the surface of the burning material was observed. In contrast to the REF sample, the detachment of the molten fragments of the composition took place at regular intervals. The adsorption of triple layers on the surface of the nanocomposite contributed up to about a 38% reduction in the burning time of the 10 LMMT composition in relation to the REFMMT material. There was a tendency to increase the average burning time of the materials with an increase in the coverage of the PA6/MMT system. The effect of this dependence was also reducing the average burning rate with the increase in the deposited triple layers. Nevertheless, applying the next five triple layers reduced the burning rate by only one unit. In order to qualify the obtained composites for individual fire classes, the ISO 1210 standard was applied, according to which the material belongs to the horizontal position (HB) class, when after removing the applied flame, one of the following scenarios occurs:  
1. The material does not burn visibly, and the flame front does not reach the measuring line beginning (25 mm); and/or
2. The flame front reaches the entire range of the measuring section (100 mm) at the same time not exceeding the measurement end line; and/or
3.