The FTIR spectrum is consistent with POLYESTER, the top library match (similarity 0.881, high confidence). The material incorporates a substantial amount of calcium carbonate filler, as evidenced by the characteristic carbonate vibrational pattern. The organic matrix exhibits aromatic/amide features, supporting the reference library comparison direction FTIR In-Depth Interpretation was not selected for this task, so this section shows the library-search result only and no deep AI interpretation was run.