# Material Composition Testing Related to Measurement Instrument Enclosure Design and Safety
## 3 Results
### Classification of Test Samples by Material Mixture
\begin{table}
\begin{tabular}{l l l l} \hline \hline
**Basic Material Group** & **Mixture Mark** & **Material Combination** & **Material Category** \\ \hline \multirow{8}{*}{1} & S1\_1.5 & 81001531 & Cannot be categorized \\  & S1\_3 & 81001531 & HB75 \\  & S2\_1.5 & 81001531 + 81001532—4\% & HB75 \\  & S2\_3 & 81001531 + 81001532—4\% & HB40 \\  & S3\_1.5 & 81001531 + 81000577—2\% & Cannot be categorized \\  & S3\_3 & 81001531 + 81000577—2\% & HB75 \\  & S4\_1.5 & 81001531 + 81000577—2\% + 81001532—4\% & HB75 \\  & S4\_3 & 81001531 + 81000577—2\% + 81001532—4\% & HB75 \\  & S5\_1.5 & 81001531 + 81001483—2\% & HB75 \\  & S5\_3 & 81001531 + 81001483—2\% & HB75 \\ \hline \multirow{8}{*}{2} & S6\_1.5 & 81001295 & HB75 \\  & S6\_3 & 81001295 & HB75 \\  & S7\_1.5 & 81001295 + 81001119—2\% & HB75 \\  & S7\_3 & 81001295 + 81001119—2\% & HB40 \\ \hline \multirow{8}{*}{3} & S8\_1.5 & 81001482 & HB \\  & S8\_3 & 81001482 & HB \\  & S9\_1.5 & 81001482 + 81001483—2\% & HB \\  & S9\_3 & 81001482 + 81001483—2\% & HB \\ \hline \multirow{8}{*}{4} & S10\_1.5 & 81001443 & HB \\  & S10\_3 & 81001443 & HB \\ \hline \multirow{8}{*}{5} & S11\_1.5 & 81002009 & HB75 \\  & S11\_3 & 81002009 & HB40 \\  & S12\_1.5 & 81002009 + 81001119—2\% & HB40 \\  & S12\_3 & 81002009 + 81001119—2\% & HB40 \\ \hline \multirow{8}{*}{6} & S13\_1.5 & 81001810 & HB40 \\  & S13\_3 & 81001810 & HB \\  & S14\_1.5 & 81001810 + 81001119—2\% & HB75 \\  & S14\_3 & 81001810 + 81001119—2\% & HB \\ \hline \multirow{8}{*}{7} & S15\_1.5 & 81000936 & HB \\  & S15\_3 & 81000936 & HB \\ \hline \multirow{8}{*}{8} & S16\_1.5 & 81000935 & HB \\  & S16\_3 & 81000935 & HB \\ \hline \multirow{8}{*}{9} & S17\_1.5 & 10223024 & HB \\  & S17\_3 & 10223024 & HB \\ \hline \multirow{8}{*}{10} & S18\_1.5 & 10238024 & HB \\  & S18\_3 & 10238024 & HB \\ \hline \multirow{8}{*}{11} & S19\_1.5 & 81000264 & HB \\  & S19\_3 & 81000264 & HB \\  & S20\_1.5 & 81000264 + 81001135—2\% & HB40 \\  & S20\_3 & 81000264 + 81001135—2\% & HB \\  & S21\_1.5 & 81000264 + 81001483—2\% & HB \\  & S21\_3 & 81000264 + 810011483—2\% & HB \\  & S22\_1.5 & 81000264 + 81001134—2\% & HB \\  & S22\_3 & 81000264 + 81001134—2\% & HB \\  & S23\_1.5 & 81000264 + 81000267—2\% & HB40 \\  & S23\_3 & 81000264 + 81000267—2\% & HB40 \\ \hline \multirow{8}{*}{12} & S24\_1.5 & 81000863 & HB40 \\  & S24\_3 & 81000863 & HB \\  & S25\_1.5 & 81000863 + 81001315—2\% & HB \\  & S25\_3 & 81000863 + 81001315—2\% & HB \\ \hline \hline \end{tabular}
\end{table} 
Table 5: Classification of test samples according to burning categories and material mixtures. cation regardless of thickness or additive variations. Additionally, one group consistently achieved HB40, and another consistently attained the HB75 classification. However, some material groups exhibited deviations, with certain additive combinations significantly altering their classification. These deviations provide essential insights for manufacturers, indicating which material mixtures may require additional scrutiny or specific adjustments in their formulation to maintain the desired fire safety properties. Our results align well with findings from previous studies examining the effects of minor additives on HB flammability. [PERSON] et al. demonstrated that inorganic fillers significantly affect flammability behaviour, confirming our observations regarding the fillers' impact [9]. [PERSON] et al. similarly found improved flame resistance in polyamide 6 composites with thermal conductive fillers, aligning with our findings about thickness-dependent performance [7]. Conversely, [PERSON] et al. indicated that different fillers have varied impacts on polyamide 6 behaviour, supporting our conclusion about the unpredictability of compositional changes [15]. These studies collectively reinforce the importance of empirical evaluations when considering minor formulation variations in polymers.